US20130238763A1 - Method, apparatus and system for provisioning a push notification session - Google Patents
Method, apparatus and system for provisioning a push notification session Download PDFInfo
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- US20130238763A1 US20130238763A1 US13/845,435 US201313845435A US2013238763A1 US 20130238763 A1 US20130238763 A1 US 20130238763A1 US 201313845435 A US201313845435 A US 201313845435A US 2013238763 A1 US2013238763 A1 US 2013238763A1
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Abstract
A system and method for provisioning a push notification session via a communications network between an application on a client terminal and a server corresponding to the application. In one aspect, a push provisioning entity transmits a message to the client terminal, whereby to configure the client terminal into a state in which it is able to request a push notification session with the server. An application on the client terminal can then request establishment of a push notification session by transmitting a push notification session request message to the push provisioning entity. The push provisioning entity generates a token for use in validating the push notification session, associates the generated token with the application and transmits the token to the application, which uses it to establish the push notification session.
Description
- This application is a continuation of U.S. patent application Ser. No. 13/025,984, filed Feb. 11, 2011, now U.S. Pat. No. ______, the disclosure of which is considered part of the disclosure of this application and is incorporated by reference herein in its entirety.
- The present invention relates to a method, apparatus and system for provisioning a push notification session between an application running on a client terminal and a server corresponding to the application.
- Push technology is a form of data communication where a request for a transaction between a client and a server originates at the server. The technology enables a server to transmit notification messages to client terminals of its own volition. HTTP server push and Java Pushlet are examples of push technology.
- The notification messages can be transmitted directly from the server to the client, or the transmission of the notification messages can be mediated by a push notification service.
- A push notification service provides a persistent data communication channel to a client endpoint, e.g. an application on a client terminal, for delivering notification messages sent by the server. Push notification services typically require the application to register therewith, which establishes a trust relationship between the push notification service and the application.
- In addition to establishing a trusted connection with the application, the push notification service may establish a trusted connection with the device hosting the application. The trusted connection is typically established by validating a pre-provided client certificate, which serves to restrict availability of the push notification services.
- Establishment of push notification channel at the push notification service is initiated in response to receipt of a registration request sent by the application: the push notification service associates the push notification channel with the application, and supplies data identifying the push notification channel to the application. In response to receiving the data identifying the channel, the application provides the channel data to the server. The server can then transmit any notification messages along with the channel data to the push notification service for delivery to the application.
- The data identifying the channel is created during registration of the application with the push notification service and is valid for the life of the application, as is the trust relationship that is established between the push notification service and the application. Thus, in an arrangement, such as where either the server or the application is compromised, the whole push notification channel will be permanently compromised. This makes the push notification channel unreliable for secured or sensitive communications.
- In accordance with one aspect of the present invention, there is provided a method, a system and a push provisioning entity for provisioning a push notification session according to the appended claims.
- Embodiments provide ‘on demand’ configuration of a client terminal to access push notification services. As soon as the client terminal has been configured into an operative state in which it is enabled to request one or more push notification sessions (so-called first operative state), applications on the client terminal can request establishment of a push notification session.
- In some arrangements, the client terminal is responsible for transmitting the push notification provisioning request message and processing the response message associated therewith, which effects transition of the client terminal from an unenabled (so-called second operative state) to the enabled operative state. This change in operative state of the client terminal enables all the applications on the client terminal to establish push notification sessions.
- As is well known in the art, a session is semi-permanent interchange of information between two or more computing devices, and a session established at a certain point in time is torn down later. Thus, the first aspect additionally introduces validity to push notifications by establishing a push notification session, as opposed to a channel, which, as is well known in the art, does not have an associated validity.
- Embodiments further include generating a token for use in validating the push notification session in response to a push notification session request message from an application on the client terminal. The generated token is associated with the application, and is used for identifying the session endpoint associated with the client, which is typically the application. The token is additionally utilised as a session validity credential. Therefore, a mechanism is provided for validating push notification sessions.
- In response to receiving the token, the application may provide the token to the server, which utilises the received token to establish the push notification session. The application may utilise any communication means available on the client terminal to provide the token to the server. Servers are network entities that are capable of communicating with client terminals so as to provide push notification messages to applications on client terminals.
- In one arrangement, the client terminal comprises a plurality of applications, each of which is capable of requesting establishment of a push notification session. The client terminal can generate a different token for each respective application in response to receipt of a push notification session request message originating therefrom. Thus, each of the applications on the client terminal is enabled to establish push notification sessions independently of other applications on the client terminal.
- Conveniently, the method involves selectively generating the token on the basis of a predetermined criterion. The selective generation of the token extends the capability of discarding push notification session requests from applications. For example, requests can be discarded on the basis of application authentication and authorisation, user authentication and server authentication. Thus, push notification sessions may be selectively provided on the basis of trust relationships with the application and the server.
- In a further arrangement, there is provided a mechanism for identifying a network node to transmit a server access request, thereby enabling applications without server contact details to communicate with the server. The identified network node may be a secure access provisioning entity that mediates establishment of a secured connection between the server and the client terminal. The secure access provisioning entity may maintain a list of applications that are authorised to conduct a push notification session with the server, thereby reducing the server's processing overhead by filtering access requests. The method may involve monitoring the application authorisation state at the secure access provisioning entity so as to control established push notification sessions.
- In a yet further arrangement, the server may selectively request validation of the token supplied thereto by the application, thereby enabling the server to verify a given session. The method involves verifying whether the token supplied to the server by the application corresponds to the token supplied to the application to perform the validation. The token can be verified by the server before, during or after establishment of the push notification session, thereby preventing establishment or maintenance of invalid or bogus push notification sessions. The method may involve updating a session state corresponding to the push notification state in accordance with the evaluation.
- Advantageously, the method involves determining the operational state of the server so as to control the associated push notification session. Thus, for example, if the server has crashed or is inaccessible, the method may terminate the push notification session associated therewith. The operational state of the server may be determined based on a predetermined inactivity period and/or data indicative of the operational state of the server received from the server. The method may involve monitoring the operational state associated with the server for updates.
- Conveniently, the method involves determining a session state associated with the push notification session so as to control the push notification session. The session state of the server may be determined based on a predetermined inactivity period and/or data indicative of the session state of the server received from the server. Thus, for example, the push notification session that is determined to be inoperative can be terminated.
- In a yet further arrangement, the method involves selectively transmitting a notification message received from the server to the client terminal for delivery to the application, if the token received with the notification message corresponds to the token provided to the application for the push notification session. The method may involve selectively transmitting the notification message after scanning the notification message for malicious or inappropriate content, thereby providing means for filtering inappropriate and harmful messages.
- In other embodiments, the method involves validating the token upon request, thereby enabling the servers to establish authenticity of the tokens prior to establishing the push notification sessions. In the event the token is invalid, the server can terminate establishment of the push notification session. This permits the servers to filter bogus or invalid requests, and only expend resources on establishing valid push notification sessions.
- The method may involve updating a session state corresponding to the push notification session or reserve network resources for the push notification session depending on the validity of the token.
- The method may involve selectively transmitting the authorisation message on the basis of a predetermined rule, which may include verifying the server's authentication credential. The predetermined rule may also involve verifying a record corresponding to the server to ensure that the server is authorised to conduct the push notification session. In absence of the record, the server may transmit a conditional authorisation message to the server. The conditional authorisation message causes the server to perform a registration process, which leads to the record corresponding to the server being created. Thus, the method provides an ‘on demand’ server registration mechanism.
- In one arrangement the methods performed by a network node configured with software in the form of a set of instructions which, when executed by the network node, cause the network node to perform some or all the above-described steps.
- Further features and advantages of the invention will become apparent from the following description of preferred embodiments, given by way of example only, which is made with reference to the accompanying drawings.
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FIG. 1 is a schematic diagram of a network environment within which embodiments operate; -
FIG. 2 is a block diagram showing an established push notification session via the push provisioning entity according to an embodiment; -
FIG. 3 is a block diagram showing the components of the push provisioning entity according to an embodiment; -
FIG. 4 is a block diagram showing the interaction of the components of the push provisioning entity with the application and the server according to an embodiment; -
FIG. 5 is a timing diagram showing steps performed by the components shown inFIG. 2 when establishing a push notification session according to an embodiment; -
FIG. 6 is a timing diagram showing steps performed by the components shown inFIG. 2 when establishing an encrypted communication session between the client terminal and the server according to an embodiment; -
FIG. 7 is a timing diagram showing steps performed when validating a push notification session according to an embodiment; -
FIG. 8 is a timing diagram showing steps performed to maintain a server side context of the push notification session according to an embodiment; -
FIG. 9 is a timing diagram showing steps performed to maintain an application side context of the push notification session according to an embodiment; and -
FIG. 10 is a timing diagram showing steps performed when controlling validity of the push notification session from the server end according to an embodiment. - Embodiments are concerned with provisioning a push notification session via a communications network between an application on a client terminal and a server corresponding to the application. More specifically, embodiments are concerned with establishing a mediated push notification session. The processing involved in establishment of push notification sessions is described in detail below, but first an overview of a network environment within which the embodiments operate will be described with reference to
FIG. 1 , which shows a block diagram illustrating acommunications network 101 through which a push notification session is established between aserver client terminal - The
communications network 101 is configured to enable packet communication between theservers client terminals push provisioning entity 102. Theclient terminals server client terminals - In a preferred arrangement, such as where the
client terminals communication network 101 is operatively connected tomobile networks client terminals mobile networks client terminals mobile networks mobile networks -
Servers client terminals server client terminal - The
servers service provisioning entity 3A, such as an internet based push service provider like MyWeather Mobile™ or it may be an enterprise networkservice provisioning entity 3B which is a part of anenterprise network 4B. - The independent
service provisioning entity 3A has the flexibility of deciding on a security policy, a user selection policy, etc, whereas the enterprise networkservice provisioning entity 3B is restricted by the policies ofenterprise network 4B. Theenterprise network 4B may have a firewall regulating the traffic transmitted to/from theenterprise network 4B. In this way, theenterprise network 4B restricts the services of theserver 3B to the members of theenterprise network 4B, thus to access services of the enterprise networkservice provisioning entity 3B a user must be a member of theenterprise network 4B. - Push technology is a unidirectional form of data communication where a request for a transaction originates at the
server servers client terminals client terminals servers client terminals servers - The
servers client terminals client terminals - Transmission of notification messages can be mediated by the
push provisioning entity 102, which provides a persistent data communication channel to theclient terminal servers - The
push provisioning entity 102 requires an application on theclient terminal push provisioning entity 102 generating data identifying the push notification session, and storing a mapping between the data identifying the session and the requesting application. The mapping enables thepush provisioning entity 102 to identify which application is associated with a given notification message received from theservers - However, prior to application registration, the
push provisioning entity 102 establishes a trust relationship with thecorresponding client terminal client terminal client terminal push provisioning entity 102. - Turning to
FIG. 2 , theclient terminal 1A may comprise a plurality of applications, each of which 5A, 5B and 5C is capable of receiving push notification messages. According to conventional methods, each of theapplications servers push provisioning entity 102. Thepush provisioning entity 102 associates each of the requestingapplication application server server push provisioning entity 102 for delivery to the requestingapplication push provisioning identifier 102 utilises the mapping between the push identifier and itscorresponding application application - Thus, conventional mediated push methods merely establish a transmission path between the
server application - The channel established between the
server application application server - The
push provisioning entity 102, when configured according to the embodiments, is capable of provisioning a push notification session via thecommunications network 101 between theapplication client terminal 1A and theserver application -
Client terminals applications push provisioning entity 102, and in the second state theapplications - Turning to
FIG. 3 , an arrangement of thepush provisioning entity 102, when configured according to the embodiments will now be described. Thepush provisioning entity 102 comprises a combination of processing components including standard operating system components, memory, processor and permanent storage. Thepush provisioning entity 102 further cooperates with I/O communication interfaces. - In addition the
push provisioning entity 102 comprises aprovisioning manager 309, which is responsible for registering theclient terminals client terminals provisioning manager 309. - The
push provisioning entity 102 further comprises adevice connector framework 305, which is capable of implementing a variety of communication protocols that enableclient terminals push provisioning entity 102. Without limitation, these protocols include Mobile Application Part (MAP) and Internet Protocol (IP). In addition to implementing the communication protocols, thedevice connector framework 305 controls the communication interfaces of thepush provisioning entity 102 so as to enableclient terminals push provisioning entity 102. - The
push provisioning entity 102 further comprises arouting manager 308, which directs a received message, such as a push notification provisioning request message, to the appropriate component, such as theprovisioning manager 309, for processing. In addition, therouting manager 308 routes a communication message originating from thepush provisioning entity 102, such as a configuration message, to an appropriate entity, such as a network gateway (not shown), to effect delivery of the communication message to the intended destination. - To enable communication between the
push provisioning entity 102, andservers push provisioning entity 102 further comprises aserver connector framework 302. Theserver connector framework 302 implements the protocols that enable theservers push provisioning entity 102. In addition, theserver connector framework 302 controls the communication interfaces of thepush provisioning entity 102 to enable communication between thepush provisioning entity 102 and theservers - In addition to the standard server communication protocols, the
push provisioning entity 102 maintains a plurality of legacy server communication protocols, such as the frame relay protocol, which are invoked, upon requirement, by a legacynetwork support manager 303 for use by theserver connector framework 302. The legacynetwork support manager 303 also maintains a plurality of proprietary server communication protocols, which can also be invoked by the legacynetwork support manager 303 when communicating with a givenserver - Push Provisioning
- The mechanism by which a given client terminal is configured into the first operative state will now be described. In the first instance the
provisioning manager 309, responsive to receiving a push notification provisioning request message, or registration request, from theclient terminal client terminal provisioning manager 309 extends the capability of ‘on demand’ configuration of theclient terminals client terminal client terminal provisioning manager 309 concludes the registration thereof. - The
provisioning manager 309 may selectively transmit the configuration message on the basis of a predetermined condition. The predetermined condition may involve verifying the authorisation status of theclient terminal - The authorisation status corresponding to the
client terminals device authorisation manager 306 component of thepush provisioning entity 102. Thedevice authorisation manager 306 may also maintain a list of prohibited devices, or a black list of devices. Theenterprise network 4B may contribute to the development and maintenance of such a black list. - The predetermined condition may also involve verifying compliance with the various communication and/or security protocols present on the requesting
client terminal client terminal provisioning manager 309 may defer the registration ofclient terminal client terminal push provisioning entity 102 or an entity cooperating with thepush provisioning entity 102. - The package may be provided selectively to the
client terminals enterprise network 4B. Theclient terminals provisioning manager 309 would not provide the package to theclient terminals enterprise network 4B. - The
provisioning manager 309 may permit theclient terminal server enterprise network 4B, thepush notification entity 102 can verify compliance to ensure that the requesting user is permitted to use the requested services. - In an arrangement such as where the
applications client terminal 1A correspond to both restrictive and unrestrictive service providers, the configuration message from theprovisioning manager 309 causes theclient terminal 1A to be configured in a third state, whereby theapplications server 3A, but not with the restrictive service providers, such as theserver 3B. Theprovisioning manager 309 then transmits a conditional authorisation message to theclient terminal 1A, which then communicates with theenterprise network 4B to request transmission of an authorisation message to theprovisioning manager 309 so that it can transit into the first state. Alternatively, thepush provisioning manager 309 may seek the requisite authorisation from theenterprise network 4B directly without involving theclient terminal 1A. - The
enterprise network 4B may be permitted by theprovisioning manager 309 to control authorisation for services provided by entities therein or it may be permitted to control authorisation for all the services available for consumption at theclient device 1A. Theclient terminal 1A may have applications corresponding to a plurality of the restrictive service providers, each of which would have an authorisation control for the mediated push provisioning for their corresponding services. - In the event that a user corresponding to a given
client terminal enterprise network 4B, theenterprise network 4B may transmit a message, whereby to change the authorisation status associated with the givenclient terminal client terminal enterprise network 4B. Thus, embodiments not only extend the scope of the mediated push services, but also enable effective authorisation control by theenterprise network 4B. - The
provisioning manager 309 may also establish an initial trust relationship with theservers enterprise network 4B associated therewith, whereby to vet the push service providers. The initial trust relationship with theservers server push provisioning entity 102. - The
provisioning manager 309 may evaluate the suitability of theserver enterprise network 4B associated therewith for providing push notification services. The suitability may be evaluated on the basis of a predetermined rule, such as the nature of content provided. - A server
authorisation manager component 304 of thepush provisioning entity 102 maintains the authorisation status of theservers provisioning manager 309 may conditionally register a givenserver client terminals provisioning manager 309 deems the content provided by a givenserver server authorisation manager 304 would associate the conditional rule with the givenserver - As discussed above, upon a given
client terminal 1A being configured into the first operative state, theapplications client terminal 1A are enabled to request establishment of a mediated push notification session. In order to establish a push notification session, a givenapplication 5A transmits a push notification session request to thepush provisioning entity 102. Responsive to receiving the push notification session request, therouting manager 308 routes the request to apush provisioning manager 301. Thepush provisioning manager 301 then generates a token for use in validating the push notification session. - The
push provisioning manager 301 may selectively generate the token on the basis of a predetermined criterion. The predetermined criterion may involve validating a record corresponding to theserver push provisioning entity 102 or at any other entity remote from theservers servers servers server authorisation manager 304. Thus, thepush provisioning manager 301 may prevent establishment of push notification sessions with unauthorised servers. Thepush provisioning manager 301 may determine a givenserver application authorisation manager 307. - The
application authorisation manager 307 acquires the application and server pairings during establishment of thepush provisioning entity 102′s initial trust relationship with the server's 3A and 3B. In an arrangement such as where thepush provisioning manager 301 receives a push notification session request message from a givenapplication 5C which does not have a corresponding server pairing record at the applicationauthorisation manager component 307, thepush provisioning manager 301 associates a condition with the record corresponding to the generated token, which causes such a pairing to be created when a message associated therewith is received from a correspondingserver provisioning manager 309 may require an unknown server to register therewith prior to establishing the requested push notification session. - The predetermined criterion may also involve verifying an authentication credential associated with the
application 5A. The application authentication credential may be provided by theenterprise network 4B. The application authentication credential may be limited for a predetermined duration or number of uses, thus, for example, theenterprise network 4B may offer a limited use/duration trial of the services associated therewith. The application authentication credential may also be provided by theenterprise network 4B for longer durations or with no restrictions. The application authentication credential may alternatively be an application signature. - The predetermined criterion may further involve authenticating a user using the
client terminal 1A. The authentication of the user establishes a trust relationship with the end user of the device, thereby restricting damage due to accidental use by an unauthorised user. - The predetermined criterion may also involve verifying an authentication credential associated with the
server application 5A. Thepush provisioning manager 301 determines theserver application 5A by looking up the server application pairings maintained by the applicationauthorisation manager component 307. In response to the determination, thepush provisioning manager 301 can acquire an authentication credential therefrom. - In response to the selective generation of the token, the
push provisioning manager 301 associates the generated token with theapplication 5A by generating a record corresponding to the requested push notification session, and storing data identifying theapplication 5A, theclient terminal 1A, a session ID and the generated token therein. - The
push provisioning manager 301 utilises tokens to identify the record corresponding a particular push notification session, which then enables thepush provisioning manager 301, in cooperation with therouting manager 308, to route notification messages to theircorresponding applications push provisioning entity 102. - The
push provisioning manager 301 then selectively transmits the token to theclient terminal 1A for delivery to theapplication 5A, which is utilised by theapplication 5A in establishing the push notification session. Theclient terminal 1A, responsive to receiving the token, creates a record comprising data identifying theapplication 5A, the received token and the session ID. - As is well known in the art, a session is semi-permanent interchange of information between two or more computing devices. A session established at a certain point in time is torn down later. Since the token is used for validating a push notification session, embodiments introduce temporality in the generated session identification data, thereby restricting push communication between
application server applications - By contrast, the prior art methods do not limit the validity of the application registration for push services. This makes the prior art methods unsuitable for providing secure messages via push notifications. For example, consider the scenario, where a
client terminal 1A comprising anapplication 5A having access to theenterprise network 4B'spush notification service 3B changes owners, wherein the new owner is not authorised to use the services of theenterprise network 4B. In this scenario, the new owner can gain access to the notification messages transmitted to theapplication 5A by theserver 3B. This is because the trust relationship in the prior art methods is never renewed. - By contrast, embodiments require the application to renew this trust relationship every time it wishes to establish a push notification session, when a given application's suitability for continued reception of further push notification messages can be verified. The embodiment validates the
application 5A for receiving push notifications for a limited timeframe, i.e. by evaluating theapplication 5A's suitability for establishing a session as opposed to a channel. - Turning to the establishment of the push notification session, in the event that the
applications push provisioning manager 301, thepush provisioning manager 301 generates a different token for each respective application in response to receiving push notification session request message from theapplication application - As a different token is generated for each push notification session between same or different endpoints, i.e. the
applications servers push provisioning manager 301 for use in establishing and conducting a given push notification session. Therefore, the token may utilised as a session validity credential. - Turning to
FIG. 4 , an arrangement for establishing a push notification session between theapplications server 3B of theenterprise network 4B will now be described. In addition to theserver 3B, theenterprise network 4B comprises a firewall 401 that regulates the passage of packets in and out of theenterprise network 4B. Theenterprise network 4B may additionally comprise a deviceaccess control entity 403 that maintains a list ofclient terminals enterprise network 4B, including the push notification service of theserver 3B. The deviceaccess control entity 403 keeps track of changes in access authorisation associated with theclient terminals - The device
access control entity 403 may co-operate with theprovisioning manager 309 so as to notify thepush provisioning entity 102 regarding theclient terminals - The device
access control entity 403 may control authorisation of theapplications application authorisation manager 307. Theapplication authorisation manager 307 can then restrict the token generation toapplications - The sequence of steps leading to the establishment of a push notification session between the
application 5A residing on theterminal 1A with theserver 3B will now be described with reference toFIG. 5 . To recap, before theapplications push provisioning entity 102, theclient terminal 1A has to complete registration with theprovisioning manager 309.Client terminal 1A receives a configuration message (step 5.2) in response to transmitting a provisioning request message (step 5.1), which triggers theclient terminal 1A to configure itself into the first operative state. In which, theapplications client terminal 1A are enabled to establish push notification sessions. -
Application 5A initiates establishment of a given push notification session by transmitting a request for the given push notification session to theclient terminal 1A (step 5.3), which then transmits a request for a token to the push provisioning manager 301 (step 5.4). - The
push provisioning manager 301 then generates a token (step 5.5) for use in validating the requested push notification session. As discussed above, the token may be generated in dependence on the predetermined criterion. Upon generating the token, thepush provisioning manager 301 transmits the token to theclient terminal 1A (step 5.6), which then passes the received token to theapplication 5A. In response to receiving the token, theapplication 5A provides the received token to the correspondingserver - The delivery of the token to the
corresponding server 3B is not limited to a specific protocol or communication medium. Theapplication 5A may utilise any communication protocols or mediums available therewith to provide the token to thecorresponding server 3B. Without limitation the communication protocols may include connectionless protocols, such as user datagram protocol, connection oriented protocols, such as transmission control protocol, store-and-forward protocols, such as Email, mobile messaging services, such as short message service, point-to-point communication protocol, such as Bluetooth™ or point-to-multipoint communication protocols, such as Internet Group Multicast Protocol. Without limitation theapplication 5A may utilise any wireless, such as Wi-Fi or Global System for Mobile Communications (GSM), or wired, such as Ethernet, communication mediums that are available on theterminal 1A for transmitting the token. - In the event that the
application 5A does not have the contact details, such as the IP address, of theserver 3B or theserver 3B is unreachable, theapplication 5A may seek assistance from thepush provisioning manager 301 by sending a server connection request message (step 5.8). - The assistance may be provided by the
push provisioning manager 301 by supplying the contact details of theserver 3B to theapplication 5A. Theapplication 5A may then communicate with theserver 3B with these contact details so as to provide the token to theserver 3B. Alternatively, thepush provisioning manager 301 in cooperation with therouting manager 308 may identify a network node to transmit a received server access request from theapplication 5A, and transmit the request to the identified node, thereby facilitating provisioning of the token from theapplication 5A to the server. - The network node may be the
server 3B itself or an entity, such as aproxy server 402, associated with theserver 3B (as shown on step 5.9 ofFIG. 5 ), which applies the policies of theenterprise network 4B to the packets to/from theserver 3B. The policies may involve encrypting and decrypting packets to/from theserver 3B. - The network node may alternatively be a secure connection mediation entity, or a relay server, associated with the
server 3B, which may be internal or external to theenterprise network 4B. - The
application 5A can then establish a connection with theserver 3B for delivering the token. The connection may either be established by theapplication 5A, or theclient terminal 1A on behalf of theapplication 5A. - When the connection is established between the
client terminal 1A and theproxy server 402, theapplication 5A transmits the token to theserver 3B via theclient terminal 1A and the proxy server 402 (as shown on steps 5.11, 5.12 and 5.13 ofFIG. 5 ). In response to receiving the token, theserver 3B may establish the push notification session. - The
server 3B may alternatively confirm the validity of the token with thepush provisioning manager 301 prior to establishing the push notification session. To validate the token, theserver 3B transmits a token validation request comprising the token received from theapplication 5A to thepush provisioning manager 301. The token validation request may be transmitted directly by theserver 3B to thepush provisioning manager 301. Alternatively and as shown inFIG. 5 , theserver 3B may transmit the token validation request via the proxy server 402 (steps 5.14 and 5.15). - In response to receiving the token validation request, the
push provisioning manager 301 evaluates whether the received token corresponds to the token provided to theapplication 5A for the push notification session so as to enable the push notification session between theserver 3B and theapplication 5A. - The
push provisioning manager 301 may then selectively transmit an authorisation message to theserver 3B in dependence on the evaluation, whereby to enable the push notification session. Therefore, thepush provisioning manager 301 comprises means for preventing establishment of the push notification sessions corresponding to bogus or invalid tokens. - Thus, in the event that the token received from the
server 3B corresponds to the token provided to theapplication 5A, thepush provisioning manager 301 would selectively transmit the authorisation message to theserver 3B. The authorisation message may, as shown inFIG. 5 , be transmitted via the proxy server 402 (steps 5.16 and 5.17), or may be transmitted directly to theserver 3B. - The
push provisioning manager 301 may selectively transmit the authorisation message in dependence on a predetermined authorisation criterion. The predetermined authorisation criterion may involve verifying authenticity of theserver 3B, e.g. on the basis of an authentication credential associated therewith. Thepush provisioning manager 301 may acquire an authentication credential of theserver 3B by transmitting an authentication credential request thereto, in response to receiving the token validation request. The predetermined authorisation criterion may also involve verifying the association between theserver 3B and theapplication 5A by reviewing server to application pairings maintained by theapplication authorisation manager 307. - In the event that the tokens do not correspond to each other or the predetermined authorisation condition is not satisfied, the
push provisioning manager 301 considers the evaluation to have failed. Thepush provisioning manager 301 may selectively transmit an error message to theserver 3B, thereby causing the push notification session establishment to be terminated. - The
push provisioning manager 301 may update the session state associated with the push notification session in dependence on the evaluation. For example, session state may be updated from pending to invalid, if the evaluation fails. - In the event that the evaluation is successful, the
push provisioning manager 301 marks the push notification session as valid upon transmitting the authorisation message, and updates the session state of the corresponding push notification session accordingly. - The
server 3B determines the outcome of the token validation request on the basis of any received response messages, such as error or authorisation messages, from thepush provisioning manager 301. If theserver 3B does not receive any messages within a predetermined time period of sending the token validation request, theserver 3B may consider the evaluation to have been unsuccessful or may retransmit the token validation request. - In the event that the
server 3B receives the error message, theserver 3B terminates establishment of the push notification session, and may transmit a failure message to theapplication 5A, either directly or via thepush provisioning entity 102. Theapplication 5A may then reattempt establishment of the push notification session by transmitting a further push notification session request message to the push provisioning manager 301 (step 5.3). - In the event that the
server 3B receives an authorisation message indicative of successful authorisation, theserver 3B concludes establishment of the push notification session. Theserver 3B may then begin transmitting notification messages to theapplication 5A utilising the established push notification session. - Notification messages may be utilised by the
server 3B to convey information to theapplication 5A or the user associated therewith, such as a new email notification to theapplication 5A or status updates. Notification message may comprise textual, graphical, audio, video or multimedia data. Theserver 3B could also utilise notification messages to transmit instructions to theapplication 5A. The instructions define the steps to be executed by theapplication 5A on theclient terminal 1A. Without limitation, the instructions may include steps to update the underlying application software, invoke an application functionality, etc. - In response to a notification message at the
server 3B for theapplication 5A, theserver 3B packages the notification message and the corresponding token, and transmits the notification message to thepush provisioning manager 301. Alternatively and as shown inFIG. 5 , theserver 3B transmits the package to theproxy server 402, which then transmits it to the push provisioning manager 301 (steps 5.18 and 5.19). - The notification message may be transmitted in an unencrypted or encrypted form to the
push provisioning manager 301. As will be known to the skilled person, the encrypted message would limit the access to the contents of the notification message to the intendedapplication 5A. The notification message may be encrypted by theserver 3B. Alternatively and as shown inFIG. 5 , the notification message may be encrypted by theproxy server 402 to ensure compliance with security policies of theenterprise network 4B (step 5.19). Encryption may be based on a pre-negotiated encryption criterion. - The
push provisioning manager 301, in response to receiving the package, extracts the token from the package and utilises the extracted token to retrieve the record corresponding to the associated push notification session. - The
push provisioning manager 301 may then evaluate the token on the basis of a predetermined evaluation condition, such as the validity of the token. Thepush provisioning manager 301 validates the token by verifying whether the received token corresponds to the token provided to thecorresponding application 5A for this push notification session. As discussed above, the token also serves as session validity credential, so that the validity of the token additionally verifies the validity of the associated push notification session. The predetermined evaluation condition may also involve verifying whether theserver 3B is authorised to transmit notification messages over this push notification session. - In the event that the token evaluation is unsuccessful or the token does not have any corresponding records, the
push provisioning manager 301 discards the received package. Thepush provisioning manager 301 may further transmit an error message to theserver 3B and/or theapplication 5A. - Responsive to receiving the error message, the
server 3B may transmit a token validation request message to establish the validity of the token (steps 5.14 and 5.15) or may retransmit the notification message (steps 5.18 and 5.19). In the event that the token validation fails or a further error message is received, theserver 3B may terminate the push notification session. Theserver 3B may also transmit a tear down message to thepush provisioning manager 301, whereby to terminate the push notification session and release any network resources that may have been reserved therefor. Thepush provisioning manager 301 may further transmit the tear down message to theapplication 5A. - The
push provisioning manager 301 may monitor the failed token validations on the basis of a predetermined monitoring criterion so as to determine a likelihood of token corruption. The predetermined monitoring criterion may include number of consecutive failed token validations, e.g. push notification sessions with more than three consecutive token validation failures. The predetermined monitoring criterion may also include frequency of token validation failures from a givenserver push provisioning manager 301 may further control the push notification session on the basis of the determined likelihood, such as if the likelihood of token corruption is high, thepush provisioning manager 301 may terminate the push notification session by changing the validity of the associated token as invalid. - The
push provisioning manager 301 may also scan the received notification message so as to detect any malicious notification messages. A given notification message may be determined to be malicious on the basis of the suitability of content and/or instruction comprised therein. The scanning may comprise evaluating the data of the notification message to determine whether it is appropriate for the intended recipient. The scanning may further comprise evaluating the instructions to determine whether they are safe to be executed on theclient terminal 1A, thereby preventing malicious or dangerous instructions to be executed on theclient terminal 1A. - In the event that the notification message is determined to be malicious, the
push provisioning manager 301 discards the notification message without transmitting it to theclient terminal 1A. Thepush provisioning manager 301 may also transmit an error message to theserver 3B comprising data indicative of the scanning outcome. Thepush provisioning manager 301 may also monitor malicious messages so as to determine safeness of theservers servers applications - The notification message from the
servers push provisioning manager 301 to generate an instruction for theapplication 5A. The instruction defines steps to be executed by theapplication 5A on theclient terminal 1A. For example, if the notification message notifies theapplication 5A that the underlying application software is to be updated, thepush provisioning manager 301 may generate instructions for effecting the software update. - The
push provisioning manager 301 then selectively transmits the received notification message, and any instructions, to theclient terminal 1A for delivery to thecorresponding application 5A (step 5.20). Responsive to receiving the notification message, theclient terminal 1A passes the notification message to thecorresponding application 5A (step 5.21). - In the event that the notification message is encrypted and the decryption keys are maintained by the
client terminal 1A, theclient terminal 1A decrypts the notification message before transmission to theapplication 5A (step 5.21). Alternatively and if the decryption key is maintained by theapplication 5A, theclient terminal 1A transmits the encrypted message to theapplication 5A. - The
push provisioning manager 301 may transmit a plurality of notification messages received from theservers 3A and/or 3B destined for any of theapplications client terminal 1A in a multiplexed package. Thus, for example, if thepush provisioning manager 301 receives a first notification message from theserver 3A for theapplication 5C and a second notification message from theserver 3B for theapplication 5A, then the push provisioning manager may multiplex the first and second notification messages in a package, and deliver the multiplexed package to theclient terminal 1A. In response to receiving the multiplexed package, theclient terminal 1A would extract the first and second notification messages and provide them to theapplications push provisioning manager 301 may multiplex notification messages received within a predetermined time period. - As regards the steps for establishing a push notification session between the
applications client device 1A and theserver 3A via thepush provisioning entity 102, it is to be understood that the steps up to the acquisition of the token by theapplications server 3B above. In response to the acquisition of the token, theapplications server 3A either directly or in cooperation with thepush provisioning entity 102. Theserver 3A may then verify the authenticity of the token by communicating with thepush provisioning entity 102. As will be understood, communication between theserver 3A, and thepush provisioning entity 102 and/or theclient device 1A does not involve therelay server 601 and theproxy server 402. - Mediated Terminal-Server Connection Establishment
- As discussed above, the communication connection for delivering the token from the
application 5A to theserver 3B could either established between theapplication 5A and theserver 3B, or could be established between theenterprise network 4B and theclient terminal 1A (step 5.10). An example of the latter mediated by therelay server 601 will now be explained with reference toFIG. 6 . Therelay server 601 enables establishment of a secured connection when there is a mismatch between the communication protocols and/or capability of theclient terminal 1A and theenterprise network 4B. Therelay server 601 may also be utilised to conceal the contact details of theenterprise network 4B. - The
client terminal 1A initiates the connection establishment process by transmitting a connection request to the relay server 601 (step 6.1). Theclient terminal 1A may transmit the connection request directly to the relay server 601 (step 6.1). Alternatively, theclient terminal 1A may transmit the connection request via thepush provisioning manager 301. - In response to receiving the connection request, the
relay server 601 selectively transmits the connection request on the basis of a predetermined connection condition to a connection establishment entity, such as theproxy server 402, of theenterprise network 4B (step 6.2). The predetermined connection condition may involve determining whether a malicious software scan, or a virus scan, has been conducted on theclient terminal 1A. The predetermined connection condition may also include verifying an authentication credential associated with theclient terminal 1A, theapplication 5A, or the user associated therewith. - The predetermined connection condition may also involve verifying an authorisation state corresponding to the
client terminal 1A and/or theapplication 5A. The authorisation state may be maintained locally at therelay server 601, or may be retrieved from theenterprise network 4B. Therelay server 601 may also generate the authorisation state on the basis of outcomes of previous connection requests. Thus, therelay server 601 comprises means for filtering connection requests. - The
push provisioning manager 301 may monitor the authorisation state maintained at therelay server 601 so as to control associated push notification sessions. The monitoring of authorisation state may be conducted depending on the session state of associated push notification sessions. Thepush provisioning manager 301 may also utilise the authorisation state in selective generation of tokens for any further push notification sessions. - In response to receiving the connection request, the
proxy server 402 selectively accepts the connection request by transmitting an accept message to therelay server 601, if theclient terminal 1A is permitted to establish a secured connection with theenterprise network 4B (step 6.3). The relay server then transmits the accept message to theclient terminal 1A (step 6.4). Theclient terminal 1A transmits a key request to theproxy server 402 via the relay server 601 (steps 6.5 and 6.6). Theproxy server 402 subsequently supplies the encryption keys, preferably encrypted with a pre-shared secret, for use in communication with theenterprise network 4B. The keys are transmitted to theclient terminal 1A via the relay server 601 (steps 6.6 and 6.7). Theclient terminal 1A then requests an authentication token, different to the push notification session token, from the proxy server 402 (steps 6.8 and 6.9). - Preferably, authentication tokens are representative of an enterprise authentication credential, such as a shared secret, which may be valid for a specified period of time or until a specified event, such as termination of associated secured connection. As will be appreciated, upon expiry of authentication tokens, transmission of push notification messages to associated client terminals may be suspended, until associated authentication token has been revalidated or a new authentication token has been obtained.
- In response, the
proxy server 402 generates the authentication token for use in validating the secured connection, and packages it with an identity of the user of theclient terminal 1A. The user identification and authentication token package is then encrypted and transmitted to theclient terminal 1A via the relay server 601 (steps 6.10 and 6.11), thereby establishing the secured connection between theenterprise network 4B and theclient terminal 1A. - After establishment of the connection between the
client terminal 1A and theenterprise network 4B, theapplication 5A transmits the push notification session token to theserver 3B so as to establish the push notification session. As discussed above, theserver 3B may then establish the validity of the received token from thepush provisioning manager 301 prior to establishing the push notification session, or may establish the push notification session without any token validation. - An example of a validated push notification session establishment will now be described with reference to
FIG. 7 . In particular,FIG. 7 exemplifies an arrangement, where theapplication 5A requests establishment of a push notification session with theserver 3B that has not been registered with thepush provisioning entity 102. - In response to receiving the token from the
application 5A (steps 7.1 and 7.2), theserver 3B transmits the token to thepush provisioning manager 301 for validation (steps 7.3 and 7.4). - In response to receiving the token validation request, the
push provisioning manager 301 determines whether the received token corresponds to the token provided to theapplication 5A for this push notification session and updates the record corresponding to the push notification session on the basis of the determination. - The
push provisioning manager 301 may selectively reserve communication network resources in dependence on the determination. The reserved resources may include communication ports, bandwidth and quality of service parameters, such as priority. - In the event that the received token is determined to be compatible with the token provided to the
application 5A, thepush provisioning manager 301 may selectively transmit an authorisation message to theserver 3B on the basis of a predetermined rule (steps 7.11 and 7.12). The predetermined rule may involve verifying an authentication credential associated with theserver 3B. - The predetermined rule may also involve verifying whether the
server 3B has been scanned for the presence of malicious software. The predetermined rule is satisfied, if the scanning has occurred on theserver 3B. Thus, thepush provisioning manager 301 prevents unsafe servers from transmitting notification messages. - The predetermined rule may further involve verifying the record corresponding to the
server 3B. As discussed above, the record is maintained by theserver authorisation manager 304 and comprises data indicative of whether theserver 3B is authorised to conduct the push notification session. In the event that theserver 3B is not authorised to conduct the push notification session, thepush provisioning manager 301 marks the token as invalid, thereby preventing establishment of the push notification session. - In the event that the
server 3B, or theenterprise network 4B, is not recognised by thepush provisioning manager 301, i.e. there is no corresponding record, thepush provisioning manager 301 may transmit a conditional authorisation message instructing theserver 3B to register with the provisioning manager 309 (steps 7.5 and 7.6). The registration process causes a record corresponding to theserver 3B to be generated at thepush provisioning entity 102. - To initiate the registration process, the
server 3B transmits a provisioning request message to the provisioning manager 309 (steps 7.7 and 7.8). Theprovisioning manager 309 then processes the provisioning request in accordance with steps described above. Theprovisioning manager 309 may then selectively transmit a registration result message to theserver 3B, whereby to inform theserver 3B regarding the outcome of the registration request (steps 7.9 and 7.10). - The
provisioning manager 309 additionally informs thepush provisioning manager 301 regarding the outcome of theserver 3B′s registration request, which then processes the pending conditional validation on the basis of the outcome. In the event that theserver 3B was successfully registered, thepush provisioning manager 301 may selectively transmit a token valid message to theserver 3B, whereby to confirm the validity of the token (steps 7.11 and 7.12). Thus, thepush provisioning manager 301 is capable of registering new services ‘on demand’, thereby removing the requirement of prior registration for services. Theserver 3B may then transmit notification messages to theapplication 5A as described above (steps 7.13 to 7.16). - In any event, if the token received from the
server 3B for validation at step 7.4 is determined to be conflicting with the token provided to theapplication 5A, thepush provisioning manager 301 terminates the establishment of the push notification session by marking validity of the token as invalid. Thepush provisioning manager 301 may transmit a tear down message to theapplication 5A. - Reception of the token valid message at the
server 3B concludes the establishment of the push notification session between theapplication 5A and theserver 3B. Theserver 3B may then transmit notification messages to theapplication 5A via the push provisioning manager 301 (steps 7.13 to 7.16). - Status Monitoring
- In addition to delivering notification messages to the
applications push provisioning manager 301 may also monitor an operational state associated with theserver 3B. As is well known in the art, operational statuses are indicative of whether a given server is active, inactive, operable or inoperable. An exemplary embodiment describing operational state monitoring of theserver 3B will now be explained with reference toFIG. 8 . - The
push provisioning manager 301 comprises a monitoring interrupt that causes thepush notification manager 301 to determine the operational state of theserver 3B (step 8.2). For example, thepush provisioning manager 301 determines an operational state of theserver 3B on the basis of a predetermined inactivity period associated therewith. In other words, if components of thepush provisioning entity 102 have not received any communication from theserver 3B, it would be considered inactive by thepush provisioning manager 301. The communication received from theserver 3B may be a notification message, a token validation message, a server provisioning message, etc., and theserver 3B would be considered inoperable by thepush provisioning manager 301 when it is not capable of communicating therewith. For example, in the event of a server crash (step 8.1), theserver 3B will be inactive and inoperable until it recovers from the crash. - The
server 3B, or any entity associated therewith, such as theproxy server 402, may transmit a server operational status update message so as to indicate to thepush provisioning manager 301 that theserver 3B is operable or inoperable. The server operational status update message may be transmitted periodically by theserver 3B or during inactive periods. - Alternatively, for each of the
inactive servers push provisioning manager 301 transmits a server status enquiry message that causes theserver 3B to transmit the server operational status update message. The server status enquiry message may be transmitted directly to theserver 3B. - Alternatively and as shown in
FIG. 8 , thepush provisioning manager 301 transmits the server status enquiry message to the proxy server 402 (step 8.3). Theproxy server 402 then establishes the operation status of theserver 3B by transmitting a ping message thereto (step 8.4) and generating a server status update message in dependence on the ping response, if any (step 8.5). Theproxy server 402 then transmits the generated server status update message to the push provisioning manager (step 8.6). - As will be understood, ping messages may comprise any suitable mechanisms, such as the Internet Control Message Protocol (ICMP) ping utility, for determining the operational status of
servers - In case the
push provisioning manager 301 does not receive any server status update messages or any other communication messages from theserver 3B within a predetermined time period, thepush provisioning manager 301 considers theserver 3B to be inoperable. Thepush provisioning manager 301 may reattempt establishing the operational status of theserver 3B. - In the event that the
server 3B is determined to be inoperable, thepush provisioning manager 301 marks tokens corresponding to push notification sessions associated with theserver 3B as invalid, and transmits a push notification session tear down message to all thecorresponding applications - In addition to the operational state of the
server 3B, thepush provisioning manager 301 may also determine a session state of push notification sessions. The session state may be determined on the basis of a predetermined inactivity period associated therewith. - The session state may also be determined on the basis of a session status response message, which may be generated by the
server 3B of its own volition, or in response to a session state request message from thepush provisioning manager 301. In the latter scenario, thepush provisioning manager 301 transmits a session status request message comprising a token prefix to theserver 3B, either directly or via the proxy server 402 (steps 8.7 and 8.8). Thepush provisioning manager 301 may combine the session status request message with a server status enquiry message. The token prefix may correspond to the token of a given push notification session or a plurality of push notification sessions. The token prefix may comprise parts of push notification token that are suitable for identifying a given push notification session and/or a given push notification token, without including all the parts of push notification token, thereby preventing disclosure of push notification tokens toservers - In the event that the token prefix corresponds to a given push notification session, the
server 3B determines the session state, i.e. operable or inoperable, and transmits data identifying the determined state to the push provisioning manager 301 (steps 8.9 and 8.10). In response to receiving the session status response message, thepush provisioning manager 301 maintains (e.g.: updates) the validity of the token corresponding to the given push notification session in dependence on the associated session state. - When the token prefix corresponds to a current push notification session, the
server 3B determines the session state corresponding to the push notification session, and transmits data identifying the session states corresponding to, at least, any inoperable push notification session to the push provisioning manager 301 (steps 8.9 and 8.10). Thepush provisioning manager 301 then maintains the validity of the tokens corresponding to each of the plurality of the push notification session on the basis of their corresponding session state. - In the event that the session state of a given push notification session indicates that the given push notification session is inoperable, the
push provisioning manager 301 terminates the given push notification session by changing the validity of the associated token to invalid, thereby terminating the push notification session. Thepush provisioning manager 301 may also transmit a push notification session tear down message to associatedapplication - The
push provisioning manager 301 may also transmit a session status notification message to theapplication 5A associated with a given push notification session in dependence on the session state (steps 8.12 and 8.13). - Alternatively, the
push provisioning manager 301 may transmit the session status notification message to thecorresponding application 5A periodically on the basis of an update or heartbeat interrupt (step 8.11). The session status notification message may alternatively be transmitted to thecorresponding application 5A in response to an update in the session state or when the push notification session is determined to be inoperable. Thus, thepush provisioning manager 301 can control the push notification session by means of the session status notification message. - Application Status Monitoring
- The steps involved in monitoring the status of the
application 5A will now be described with reference toFIG. 9 . The status of theapplication 5A may become inoperable, if it is determined to be inaccessible by theclient terminal 1A or thepush provisioning manager 301. Theapplication 5A may be determined to be inaccessible due to either the application failure, such as the application software crash (step 9.1), or theclient terminal 1A failure. The application status may be determined by thepush provisioning manager 301 by monitoring any failed notification message deliveries. - In one arrangement and as shown in
FIG. 9 , theclient terminal 1A performs a status monitoring process to monitor the status of theapplication 5A. The application status may be monitored periodically, such as in response to a monitoring interrupt event (step 9.2), or in response to reception of a message, such as a notification message, associated with theapplication 5A. - The
client terminal 1A may determine the status of theapplication 5A by transmitting a ping message to theapplication 5A (step 9.3), and awaiting a response within a predetermined time period. As above, ping messages may comprise any suitable mechanisms, such as the Internet Control Message Protocol (ICMP) ping utility, for determining the status ofapplications - If the response is received with the predetermined time period, the
application 5A is determined to be operable. Theclient terminal 1A then generates an application status update message, and transmits it to thepush provisioning manager 301, which may then transmit it to theserver 3B (steps 9.5, 9.6 and 9.7). - For example, if a ping response is not received within the predetermined time period, the
application 5A is determined to be inoperable. Theclient terminal 1A may then selectively transmit a tear down message so as to terminate the push notification session associated with theapplication 5A. The tear down message from theclient terminal 1A causes thepush provisioning manager 301 to mark the validity of the associated token as invalid, thereby terminating the push notification session. Thepush provisioning manager 301 may also transmit a session tear down message to the associatedserver 3B, orservers application 5A had established a plurality of push notification sessions with a plurality ofservers push provisioning entity 102 can control the push notification sessions on the basis of the operational status of application and server, and/or the session status. - Enterprise Network Session Control
- Embodiments additionally permit the
enterprise network 4B to control the validity of the push notification sessions associated therewith. The sequence of steps enabling theenterprise network 4B to control the validity of the push notification session in dependence on the device authentication will now be described with reference toFIG. 10 . - As discussed above with reference to
FIG. 6 specifically steps 6.5 to 6.12, theproxy server 402 and theclient terminal 1A negotiate security parameters comprising an authentication token and a set of message encryption and decryption keys during the connection establishment phase (FIG. 5 step 5.10). The authentication token serves as an authentication parameter for theclient terminal 1A. - In response to receiving a notification message from the
server 3B, theproxy server 402 retrieves the authentication token and the encryption keys corresponding to theclient terminal 1A (steps 10.1 and 10.2). The proxy server then verifies the validity of the authentication token and the message encryption key (step 10.3). In the event that the message encryption key and the authentication token are valid, theproxy server 402 encrypts the notification message with the message encryption key and packages the encrypted message with the push notification session token (step 10.7). Theproxy server 402 then transmits the package to thepush provisioning manager 301, which verifies the push notification session token and uses it to determine the associatedapplication 5A (step 10.8). Therouting manager 308 transmits the encrypted notification message to theclient terminal 1A corresponding to theapplication 5A. Theclient terminal 1A then decrypts the notification message utilising the message decryption key, and provides the decrypted message to the associatedapplication 5A (steps 10.9 and 10.10). - In case the authentication token is determined to be invalid at step 10.3, i.e. the validity of the authentication token has expired, the
proxy server 402 withholds transmission of the notification message, and instead transmits an invalidate authentication token command to theclient terminal 1A via the push provisioning manager 301 (steps 10.4 and 10.5). Thepush provisioning manager 301 may also update the session state of the associated push notification session accordingly. - In response to receiving the invalidate authentication command, the
client terminal 1A re-establishes the connection with the enterprise network (step 5.10), and renews the validity of the authentication token or acquires a new authentication token (step 10.6). Theproxy server 402 then encrypts the withheld notification message with the message encryption key and effects delivery of the withheld notification message to theapplication 5A as described above (steps 10.7-10.10). - In case the validity of the message encryption key is determined to be expired at step 10.3, the
proxy server 402 may transmit the invalidate authentication token command, and cause theclient terminal 1A to re-establish or renew the security connection parameters as described above (steps 10.4-10.6). The proxy server may alternatively renew the message encryption key and encrypt the notification message with the renewed message encryption key, which causes the encrypted notification message to be delivered to theclient terminal 1A (steps 10.7-10.9). Theclient terminal 1A however would be unable to decrypt the notification message with the expired message decryption key. - The
client terminal 1A may then re-establish or renew the security connection parameters, i.e. the authentication token and/or the message encryption and decryption keys, by re-establishing the secured connection with theenterprise network 4B (step 10.6). Upon acquiring the new message decryption key, theclient terminal 1A decrypts and transmits the pending notification message to theapplication 5A. - Thus, in accordance with this embodiment the
enterprise network 4B can control push notification sessions associated therewith by controlling the validity of connection parameters of the associatedclient terminals - The above embodiments are to be understood as illustrative examples of the invention. Further embodiments of the invention are envisaged. For example, the embodiments can be implemented as one or more software or firmware applications, computer-implemented methods, program products stored on a computer useable medium, for execution on one or more processors (e.g., CPU, microcontroller) or other computing devices in a wireless station.
- Computer usable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer usable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer usable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Thus, in some aspects computer usable medium may comprise non-transitory computer usable medium (e.g., tangible media). In addition, in some aspects computer usable medium may comprise transitory computer usable medium (e.g., a signal). Combinations of the above should also be included within the scope of computer usable media.
- It will also be appreciated that the various components and means of the network entity may reside on a cluster of individual entities such that the cluster of individual entities appears as a single entity to an external entity.
- It is to be understood that any feature described in relation to any one embodiment may be used alone, or in combination with other features described, and may also be used in combination with one or more features of any other of the embodiments, or any combination of any other of the embodiments. Furthermore, equivalents and modifications not described above may also be employed without departing from the scope of the invention, which is defined in the accompanying claims.
Claims (22)
1. A method for provisioning a push notification session via a communications network between an application on a client terminal and a server corresponding to the application, the client terminal having a first operative state wherein said client terminal is enabled to request the push notification session with the server, and a second operative state, different to said first operative state, the method comprising:
responsive to receiving a push notification provisioning request message from the client terminal, transmitting a message to the client terminal, whereby to configure the client terminal into the first operative state; and thereafter
responsive to receiving a push notification session request message from said application, performing the steps of:
generating a token for use in validating said push notification session;
associating the generated token with the application; and
transmitting said token to said application for use in establishing said push notification session.
2. A method according to claim 1 , in which the client terminal comprises a plurality of applications, each application being capable of requesting a push notification session, and the method comprises generating a different token for each respective application in response to receipt of a push notification session request message originating therefrom.
3. A method according to claim 1 , in which, responsive to receiving said push notification session request message, the method further comprises updating a record corresponding to the terminal, said record being maintained at a device remote from said client terminal and accessed prior to generating the token.
4. A method according to claim 1 , wherein the method comprises selectively generating said token on the basis of a predetermined criterion, said predetermined criterion comprising one or more of:
validation of a record corresponding to the server, said record being maintained at a device remote from said server and comprising data indicative of whether the server is authorised to conduct a said push notification session;
verification of an authentication credential associated with said application; and/or
verification of an authentication credential associated with said server.
5. A method according to claim 1 , comprising providing said token from the application directly to the server, whereby to establish said push notification session.
6. A method according to claim 1 , wherein, responsive to a server access request from said application, the method comprises identifying a network node to transmit the received server access request, and transmitting the server access request thereto.
7. A method according to claim 6 , wherein said network node is the server and/or a secure access provisioning entity associated with the server.
8. A method according to claim 7 , wherein the method further comprises selectively provisioning said push notification session in dependence on an authorisation state associated therewith, said authorisation state being indicative of whether said application is authorised by said secure access provisioning entity to conduct said push notification session.
9. A method according to claim 8 , wherein the method comprises selectively monitoring said authorisation state in dependence on a session state of said push notification session, whereby to control said push notification session.
10. A method according to claim 1 , further comprising determining an operational state of said server on the basis of a predetermined inactivity period associated therewith and/or data indicative of said operational state received from the server.
11. A method according to claim 1 , further comprising determining a session state associated with said push notification session on the basis of a predetermined inactivity period associated therewith and/or a session status response message received from said server.
12. A method according to claim 11 , wherein said session status response message is generated in response to transmission of a session status request message to the server.
13. A method according to claim 11 , comprising deriving, from said session status response message, a state of the push notification session at the server and maintaining a validity of the token in dependence on said derived state.
14. A method according to claim 11 , comprising deriving, from said session status response message, a state corresponding to a plurality of push notification sessions, each said push notification session corresponding to a different application residing on a different client terminal and having a different token associated therewith, and maintaining a validity of each of said different tokens in dependence on said derived state.
15. A push provisioning entity for provisioning a push notification session via a communications network between an application on a client terminal and a server corresponding to the application, the client terminal having a first operative state wherein said client terminal is enabled to request the push notification session with the server, and a second operative state, different to said first operative state, the push provisioning entity comprising:
a provisioning module for receiving a push notification provisioning request message from the client terminal, and transmitting a message to the client terminal, whereby to configure the client terminal into the first operative state; and
a session provisioning module for performing a push provisioning process, said session provisioning module being responsive to receiving a push notification session request message from said application whereby to perform said push provisioning process in respect of the received push notification session request message, the push provisioning process comprising:
generating a token for use in validating said push notification session;
associating the generated token with the application; and
transmitting said token to said application for use in establishing said push notification session.
16. A computer program or a suite of computer programs, comprising a set of instructions configured to cause a computer, or a suite of computers, to perform the method of claim 1 .
17. A method for enabling a push notification session between an application on a client terminal and a server corresponding to the application via a communications network, the method comprising:
responsive to receiving a push notification session request message from the application, generating a first token associated with said push notification session for use in validating said push notification session;
transmitting said first token to the application;
responsive to receiving a token validation request comprising a second token from the server, determining whether the second token corresponds to the first token provided to the application for said push notification session; and
selectively transmitting an authorisation message to the server in dependence on said determination, whereby to enable said push notification session between the server and the application.
18. A method according to claim 17 , in which, responsive to said determination, the method further comprises updating a record corresponding to said push notification session, said record being maintained at a device remote from said server and accessed prior to transmission of a notification message associated with said push notification session to said application, wherein said record comprising data indicative of a session state of said push notification session.
19. A method according to claim 17 , wherein the method comprises selectively transmitting said authorisation message on the basis of a predetermined criterion, said predetermined criterion comprising one or more of:
verification of an authentication credential associated with said server;
validation of a record corresponding to the server, said record being maintained at a device remote from said server and comprising data indicative of whether the server is authorised to conduct a said push notification session; and
verification of whether the server has been scanned for the presence of malicious software, the predetermined criterion being satisfied in the event that the scanning has occurred on the server.
20. A method according to claim 17 , wherein in the event that said second token is determined to be conflicting with said first token, the method further comprising terminating the establishment of said push notification session by marking a validity of said first token as invalid.
21. A method according to claim 20 , wherein the method further comprises transmitting a tear down message to said application, thereby terminating establishment of said push notification session.
22. A computer program or a suite of computer programs, comprising a set of instructions configured to cause a computer, or a suite of computers, to perform the method of claim 17 .
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CN103460674A (en) | 2013-12-18 |
US20160105522A1 (en) | 2016-04-14 |
US8407776B2 (en) | 2013-03-26 |
CN103460674B (en) | 2016-10-05 |
US20120210415A1 (en) | 2012-08-16 |
EP2673941B1 (en) | 2018-05-09 |
US20180338012A1 (en) | 2018-11-22 |
WO2012109163A1 (en) | 2012-08-16 |
US10038755B2 (en) | 2018-07-31 |
EP2673941A1 (en) | 2013-12-18 |
US10389831B2 (en) | 2019-08-20 |
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