DE4444089C2 - Transceiver terminal for a communication system - Google Patents

Transceiver terminal for a communication system

Info

Publication number
DE4444089C2
DE4444089C2 DE4444089A DE4444089A DE4444089C2 DE 4444089 C2 DE4444089 C2 DE 4444089C2 DE 4444089 A DE4444089 A DE 4444089A DE 4444089 A DE4444089 A DE 4444089A DE 4444089 C2 DE4444089 C2 DE 4444089C2
Authority
DE
Germany
Prior art keywords
terminal
encrypted
information
communication system
unencrypted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE4444089A
Other languages
German (de)
Other versions
DE4444089A1 (en
Inventor
Klaus Dipl Ing Dr Rieskamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Priority to DE4444089A priority Critical patent/DE4444089C2/en
Publication of DE4444089A1 publication Critical patent/DE4444089A1/en
Application granted granted Critical
Publication of DE4444089C2 publication Critical patent/DE4444089C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3226—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using a predetermined code, e.g. password, passphrase or PIN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Description

Die Erfindung betrifft ein Sende-Empfangs-Endgerät für ein Kommunikationssystem laut Oberbegriff des Hauptanspruches.The invention relates to a transceiver terminal for a communication system according to the preamble of the main claim.

Sende-Empfangs-Endgeräte dieser Art sind bekannt (Normvorschrift GSM, Technical Specifications, TS GSM 02.09 und TS GSM 12.03). Mit solchen meist mobilen Endgeräten kann in modernen Kommunikationssystemen, beispielsweise beim digitalen Mobilfunknetz (D-Netz) der Informationsaustausch (Sprache oder andere Daten) mit den stationären Basisstationen auf sehr effektive Weise verschlüsselt erfolgen, was für viele Benutzer solcher Systeme sehr wichtig ist, da dann ein unberechtigtes Abhören des Informationsaustausches ausgeschlossen ist. Dabei wird bereits beim Verbindungsaufbau über die Basisstation festgelegt, ob und in welcher Weise die Verschlüsselung durchgeführt werden soll, dazu wird im Endgerät eine dort vorgesehene Schlüsseleinrichtung, mit welcher die empfangenen Informationen entschlüsselt und die auszusendenden Informationen verschlüsselt werden, entsprechend aktiviert. Da verschiedene Netzbetreiber eines solchen umfassenden Kommunikationssystems keine solche Verschlüsselungsmöglichkeiten haben und manche Endgeräte eines solchen Systems oftmals nicht für eine Verschlüsselung eingerichtet sind, also keine entsprechenden Schlüsseleinrichtungen aufweisen, erfolgt der Informationsaustausch in solchen Systemen wahlweise verschlüsselt oder unverschlüsselt, was für den Benutzer eines Endgerätes aber nicht erkennbar ist, so daß er seinen Informationsaustausch nicht darauf einrichten kann.Transceiver terminals of this type are known (standard specification GSM, Technical Specifications, TS GSM 02.09 and TS GSM 12.03). With such mostly mobile End devices can be used in modern communication systems, for example in digital Cellular network (D network) with the exchange of information (voice or other data) the stationary base stations are encrypted in a very effective way, what many users of such systems is very important because then an unauthorized eavesdropping on the Exchange of information is excluded. It is already at Establishing a connection via the base station determines whether and in which way the Encryption is to be carried out, for this purpose there is one in the terminal provided key device with which the received information decrypted and the information to be sent is encrypted accordingly activated. Because different network operators of such a comprehensive Communication system have no such encryption options and some end devices of such a system often do not use encryption are set up, i.e. do not have any corresponding key devices, takes place the exchange of information in such systems is either encrypted or unencrypted, which is not recognizable for the user of a terminal, so that he cannot set up his information exchange for it.

Auch bei sogenannten Repeatern, wie sie bei solchen Kommunikationssystemen benutzt werden, ist es bekannt, das unverschlüsselte Signal über einen Schalter entweder wieder direkt dem Sender zuzuführen oder bei Empfang eines verschlüsselten Signals dieses zu regenerieren und über einen anderen Schalter dem Sender wieder zuzuführen (US- Patent 4.882.751). Eine Verschlüsselung im Repeator selbst findet dabei jedoch nicht statt.Also in so-called repeaters, such as those used in such communication systems , it is known to either re-encrypt the unencrypted signal via a switch directly to the transmitter or when receiving an encrypted signal regenerate and feed the transmitter again via another switch (US Patent 4,882,751). However, there is no encryption in the repeater itself instead of.

Es ist daher Aufgabe der Erfindung, für das Sende-Empfangs-Endgerät solcher Kommunikationssysteme eine Einrichtung zu schaffen, die diese Nachteile vermeidet und es dem Benutzer ermöglicht, seinen Informationsaustausch darauf einzustellen, ob dieser nun gerade verschlüsselt oder unverschlüsselt erfolgt. It is therefore an object of the invention for the transceiver terminal Communication systems to create a facility that avoids these disadvantages and allows the user to adjust their information exchange to whether this is now encrypted or unencrypted.  

Diese Aufgabe wird ausgehend von einem Sende-Empfangs-Endgerät laut Oberbegriff des Hauptanspruches durch dessen kennzeichnende Merkmale gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.This task is based on a transceiver terminal according to the generic term of the main claim solved by its characteristic features. Beneficial Further training results from the subclaims.

Gemäß der Erfindung kann der Benutzer des Endgeräts sofort über die akustische und/oder optische Anzeigeeinrichtung erkennen, ob im Moment der Informationsaustausch verschlüsselt oder unverschlüsselt erfolgt, er kann somit jederzeit seinen Informationsaustausch darauf einrichten.According to the invention, the user of the terminal can immediately hear the acoustic and / or optical display device recognize whether at the moment the Information is encrypted or unencrypted, so it can be exchanged at any time set up his information exchange on it.

Bei Hochfrequenzempfängern zum Empfang von verschlüsselten Sprachsignalen, bei denen verschiedene Verschlüsselungen eingesetzt werden können, ist es an sich bekannt, den verschiedenen Verschlüsselungsdetektoren jeweils eine Signallampe zuzuordnen, so daß dem Benutzer automatisch angezeigt wird, welche Verschlüsselungseinrichtung gerade eingeschaltet ist (US-Patent 4.440.976). Eine zusätzliche Erkennungseinrichtung ist bei dieser bekannten Einrichtung zu erkennen. Ob ein Informationsaustausch verschlüsselt oder unverschlüsselt erfolgt, ist bei dieser bekannten Einrichtung nicht erforderlich und auch nicht vorgesehen.For high-frequency receivers to receive encrypted voice signals, at which different encryption can be used for, it is in itself known, the various encryption detectors each have a signal lamp assign, so that the user is automatically shown which Encryption device is currently switched on (US Patent 4,440,976). A additional detection device can be recognized in this known device. If an exchange of information is encrypted or unencrypted, is with this known device not required and not provided.

Die Erfindung ist insbesondere für Mobilfunknetze geeignet, in welchen Sprache oder Digitalsignale für Fernkopiergeräte und dergleichen wahlweise verschlüsselt oder unverschlüsselt übertragen werden, es genügt in diesem Fall, am Handgerät (Handy) eine kleine Anzeigeleuchte, beispielsweise eine Leuchtdiode, vorzusehen, die beispielsweise nur bei der verschlüsselten Übertragung leuchtet und damit dem Benutzer anzeigt, daß er ungestört und unabhörbar sprechen kann. Eine andere Möglichkeit besteht darin, bei wirksamer Verschlüsselung dem Gespräch ein Tonsignal zu überlagern, das dem Benutzer anzeigt, daß wirksam verschlüsselt wird. Beim Informationsaustausch von Digitalsignalen beispielsweise für Fernkopiergeräte wird im Endgerät ein entsprechendes zusätzliches Kennsignal überlagert und mit ausgedruckt, so daß auch in diesem Fall der Benutzer erkennen kann, ob eine Übertragung verschlüsselt oder unverschlüsselt erfolgt. Für Länder, die eine derartige Anzeige untersagen, ist eine zusätzliche Einrichtung zum Ausschalten dieser zusätzlichen Erkennungseinrichtung vorgesehen.The invention is particularly suitable for mobile radio networks in which language or Digital signals for facsimile machines and the like optionally encrypted or transmitted unencrypted, in this case it is sufficient to use the handheld device (cell phone) to provide a small indicator light, such as a light emitting diode, the for example, only lights up during encrypted transmission and thus to the user indicates that he can speak undisturbed and inaudibly. Another possibility consists of a sound signal to the conversation with effective encryption overlay, which indicates to the user that encryption is effective. At the Exchange of information from digital signals, for example for facsimile machines, is carried out in A corresponding additional identification signal is superimposed on the terminal and also printed out, see above that even in this case the user can see whether a transmission is encrypted or unencrypted. For countries that prohibit such notification, one is additional device for switching off this additional detection device intended.

Claims (3)

1. Sende-Empfangs-Endgerät für ein Kommunikationssystem, in dem der Informationsaustausch zwischen den Endgeräten und den Basisstationen wahlweise verschlüsselt oder unverschlüsselt durchführbar ist und dazu in einem Endgerät eine Schlüsseleinrichtung zum Entschlüsseln der empfangenen und zum Verschlüsseln der auszusendenden Informationen vorgesehen ist, dadurch gekennzeichnet, daß der Schlüsseleinrichtung eine zusätzliche Erkennungseinrichtung zugeordnet ist, die erkennt, ob ein Informationsaustausch verschlüsselt oder unverschlüsselt erfolgt, und durch die Erkennungseinrichtung eine am Endgerät vorgesehene akustische und/oder optische Anzeigeeinrichtung angesteuert ist.1. Transceiver terminal for a communication system in which the information exchange between the terminals and the base stations can be carried out either in encrypted or unencrypted form and for this purpose a key device is provided in a terminal for decrypting the information received and for encrypting the information to be transmitted , characterized in that that the key device is assigned an additional recognition device which recognizes whether an information exchange is encrypted or unencrypted, and the acoustic device controls an acoustic and / or optical display device provided on the terminal. 2. Endgerät nach Anspruch 1, dadurch gekennzeichnet, daß an ihm eine durch die Erkennungseinrichtung gesteuerte Anzeigeleuchte vorgesehen ist.2. Terminal according to claim 1, characterized, that an indicator light controlled by the detection device is provided on it is. 3. Endgerät nach Anspruch 1 oder 2 für ein Mobilfunknetz, dadurch gekennzeichnet, daß in ihm eine durch die Erkennungseinrichtung gesteuerte Einrichtung zum Erzeugen eines dem Sprachsignal überlagerbaren Tonsignals vorgesehen ist.3. Terminal according to claim 1 or 2 for a mobile radio network, characterized, that in it a device controlled by the recognition device for generating an audio signal superimposed on the speech signal is provided.
DE4444089A 1994-12-10 1994-12-10 Transceiver terminal for a communication system Expired - Lifetime DE4444089C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4444089A DE4444089C2 (en) 1994-12-10 1994-12-10 Transceiver terminal for a communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4444089A DE4444089C2 (en) 1994-12-10 1994-12-10 Transceiver terminal for a communication system

Publications (2)

Publication Number Publication Date
DE4444089A1 DE4444089A1 (en) 1996-06-13
DE4444089C2 true DE4444089C2 (en) 1998-09-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE4444089A Expired - Lifetime DE4444089C2 (en) 1994-12-10 1994-12-10 Transceiver terminal for a communication system

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DE (1) DE4444089C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19748681A1 (en) * 1997-11-04 1999-05-12 Innotech Gmbh Network for the transmission of data with mobile data transmission devices
DE102015212037A1 (en) * 2015-06-29 2016-12-29 Siemens Aktiengesellschaft Monitoring a link section for transmission of data between two subscribers of a communication link

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2926013A1 (en) * 1979-06-27 1981-01-08 Siemens Ag METHOD FOR OUTPUTING A MESSAGE TEXT TO A RECEIVED PERSON
US4440976A (en) * 1981-06-17 1984-04-03 Motorola, Inc. Automatic selection of decryption key for multiple-key encryption systems
DE3431726A1 (en) * 1984-08-29 1986-03-13 Philips Kommunikations Industrie AG, 8500 Nürnberg Telecommunications network, in particular mobile radio network, with network-uniformly changeable keys
EP0112844B1 (en) * 1982-07-12 1986-08-27 Western Electric Company, Incorporated Method and apparatus for encrypted radio communications
US4882751A (en) * 1986-10-31 1989-11-21 Motorola, Inc. Secure trunked communications system
US4941174A (en) * 1988-04-19 1990-07-10 General Electric Company Digital radio with security system for selectively enabling software controlled options
DE4030993A1 (en) * 1989-10-05 1991-04-18 Racal Guardall Scotland SECURITY SIGNALING SYSTEM
EP0482233A1 (en) * 1990-10-24 1992-04-29 Omnisec Ag Cryptographic system allowing encrypted communication between users with a secure mutual cipher key determined without user interaction
DE4135061A1 (en) * 1990-10-31 1992-05-07 Rose Communications Inc METHOD AND DEVICE FOR PROTECTING TALKING DATA FROM DIGITAL TALKING RADIO SYSTEMS

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2926013A1 (en) * 1979-06-27 1981-01-08 Siemens Ag METHOD FOR OUTPUTING A MESSAGE TEXT TO A RECEIVED PERSON
US4440976A (en) * 1981-06-17 1984-04-03 Motorola, Inc. Automatic selection of decryption key for multiple-key encryption systems
EP0112844B1 (en) * 1982-07-12 1986-08-27 Western Electric Company, Incorporated Method and apparatus for encrypted radio communications
DE3431726A1 (en) * 1984-08-29 1986-03-13 Philips Kommunikations Industrie AG, 8500 Nürnberg Telecommunications network, in particular mobile radio network, with network-uniformly changeable keys
US4882751A (en) * 1986-10-31 1989-11-21 Motorola, Inc. Secure trunked communications system
US4941174A (en) * 1988-04-19 1990-07-10 General Electric Company Digital radio with security system for selectively enabling software controlled options
DE4030993A1 (en) * 1989-10-05 1991-04-18 Racal Guardall Scotland SECURITY SIGNALING SYSTEM
EP0482233A1 (en) * 1990-10-24 1992-04-29 Omnisec Ag Cryptographic system allowing encrypted communication between users with a secure mutual cipher key determined without user interaction
DE4135061A1 (en) * 1990-10-31 1992-05-07 Rose Communications Inc METHOD AND DEVICE FOR PROTECTING TALKING DATA FROM DIGITAL TALKING RADIO SYSTEMS

Non-Patent Citations (1)

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Title
KIRCHHOFER,K.H.: Abhörsicherer Draht- und Funksprechverkehr. In: Internationale Wehrrevue, 5/1976, H.5, S.761-767 *

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Legal Events

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OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
R071 Expiry of right