WO2002060116A3 - Method for broadcast encryption - Google Patents

Method for broadcast encryption Download PDF

Info

Publication number
WO2002060116A3
WO2002060116A3 PCT/GB2002/000305 GB0200305W WO02060116A3 WO 2002060116 A3 WO2002060116 A3 WO 2002060116A3 GB 0200305 W GB0200305 W GB 0200305W WO 02060116 A3 WO02060116 A3 WO 02060116A3
Authority
WO
WIPO (PCT)
Prior art keywords
receivers
subsets
revoked
encrypt
revoked receivers
Prior art date
Application number
PCT/GB2002/000305
Other languages
French (fr)
Other versions
WO2002060116A2 (en
Inventor
Jeffrey Bruce Lotspiech
Dalit Naor
Simeon Naor
Original Assignee
Ibm
Ibm Uk
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25089976&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2002060116(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ibm, Ibm Uk filed Critical Ibm
Priority to AU2002228163A priority Critical patent/AU2002228163A1/en
Priority to JP2002560330A priority patent/JP2004520743A/en
Priority to EP02710108A priority patent/EP1354443B2/en
Priority to ES02710108T priority patent/ES2334109T5/en
Priority to AT02710108T priority patent/ATE445269T1/en
Priority to KR1020037009628A priority patent/KR100543630B1/en
Priority to DE60233929T priority patent/DE60233929D1/en
Publication of WO2002060116A2 publication Critical patent/WO2002060116A2/en
Publication of WO2002060116A3 publication Critical patent/WO2002060116A3/en

Links

Classifications

    • 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
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • 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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/083—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
    • H04L9/0833—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] involving conference or group key
    • H04L9/0836—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] involving conference or group key using tree structure or hierarchical structure
    • 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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/605—Copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/606—Traitor tracing

Abstract

A tree is used to partition stateless receivers in a broadcast content encryption system into subsets. Two different methods of partitioning are disclosed. When a set of revoked receivers is identified, the revoked receivers define a relatively small cover of the non-revoked receivers by disjoint subsets. Subset keys associated with the subsets are then used to encrypt a session key that in turn is used to encrypt the broadcast content. Only non-revoked receivers can decrypt the session key and, hence, the content.
PCT/GB2002/000305 2001-01-26 2002-01-23 Method for broadcast encryption WO2002060116A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2002228163A AU2002228163A1 (en) 2001-01-26 2002-01-23 Method for broadcast encryption
JP2002560330A JP2004520743A (en) 2001-01-26 2002-01-23 Broadcast encryption and stateless receiver key revocation method
EP02710108A EP1354443B2 (en) 2001-01-26 2002-01-23 Method for broadcast encryption
ES02710108T ES2334109T5 (en) 2001-01-26 2002-01-23 Transmission coding method
AT02710108T ATE445269T1 (en) 2001-01-26 2002-01-23 METHOD FOR DISTRIBUTING ENCRYPTED DATA
KR1020037009628A KR100543630B1 (en) 2001-01-26 2002-01-23 Method for broadcast encryption and key revocation of stateless receivers
DE60233929T DE60233929D1 (en) 2001-01-26 2002-01-23 METHOD FOR DISTRIBUTION OF ENCRYPTED DATA

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/770,877 US7039803B2 (en) 2001-01-26 2001-01-26 Method for broadcast encryption and key revocation of stateless receivers
US09/770,877 2001-01-26

Publications (2)

Publication Number Publication Date
WO2002060116A2 WO2002060116A2 (en) 2002-08-01
WO2002060116A3 true WO2002060116A3 (en) 2002-09-26

Family

ID=25089976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/000305 WO2002060116A2 (en) 2001-01-26 2002-01-23 Method for broadcast encryption

Country Status (11)

Country Link
US (4) US7039803B2 (en)
EP (1) EP1354443B2 (en)
JP (1) JP2004520743A (en)
KR (1) KR100543630B1 (en)
CN (2) CN1976277B (en)
AT (1) ATE445269T1 (en)
AU (1) AU2002228163A1 (en)
DE (1) DE60233929D1 (en)
ES (1) ES2334109T5 (en)
TW (1) TWI264208B (en)
WO (1) WO2002060116A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8144869B2 (en) 2003-01-15 2012-03-27 Panasonic Corporation Content protection system, key data generation apparatus, and terminal apparatus

Families Citing this family (151)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001099332A1 (en) * 2000-06-21 2001-12-27 Sony Corporation Information recording/reproducing apparatus and method
US8127326B2 (en) 2000-11-14 2012-02-28 Claussen Paul J Proximity detection using wireless connectivity in a communications system
EP1334617B1 (en) 2000-11-14 2015-04-01 Cisco Technology, Inc. Networked subscriber television distribution
JP4581246B2 (en) * 2000-12-26 2010-11-17 ソニー株式会社 Information processing system, information processing method, and program recording medium
US7421082B2 (en) * 2000-12-28 2008-09-02 Sony Corporation Data delivery method and data delivery system using sets of passkeys generated by dividing an encryption key
JP4281252B2 (en) * 2001-01-16 2009-06-17 ソニー株式会社 Information recording apparatus, information reproducing apparatus, information recording method, information reproducing method, information recording medium, and program storage medium
US7039803B2 (en) * 2001-01-26 2006-05-02 International Business Machines Corporation Method for broadcast encryption and key revocation of stateless receivers
US9520993B2 (en) 2001-01-26 2016-12-13 International Business Machines Corporation Renewable traitor tracing
US7043024B1 (en) * 2001-04-18 2006-05-09 Mcafee, Inc. System and method for key distribution in a hierarchical tree
US7590247B1 (en) 2001-04-18 2009-09-15 Mcafee, Inc. System and method for reusable efficient key distribution
FR2824212A1 (en) * 2001-04-25 2002-10-31 Thomson Licensing Sa METHOD FOR MANAGING A SYMMETRIC KEY IN A COMMUNICATION NETWORK AND DEVICES FOR IMPLEMENTING IT
US7181620B1 (en) * 2001-11-09 2007-02-20 Cisco Technology, Inc. Method and apparatus providing secure initialization of network devices using a cryptographic key distribution approach
JP3917507B2 (en) * 2002-01-28 2007-05-23 株式会社東芝 Content providing system, user system, tracking system, content providing method, encrypted content decrypting method, unauthorized user specifying method, encrypting device, decrypting device, and program
US7340603B2 (en) * 2002-01-30 2008-03-04 Sony Corporation Efficient revocation of receivers
JP3818503B2 (en) * 2002-04-15 2006-09-06 ソニー株式会社 Information processing apparatus and method, and program
US7092527B2 (en) * 2002-04-18 2006-08-15 International Business Machines Corporation Method, system and program product for managing a size of a key management block during content distribution
US7400732B2 (en) * 2002-07-25 2008-07-15 Xerox Corporation Systems and methods for non-interactive session key distribution with revocation
US7516470B2 (en) 2002-08-02 2009-04-07 Cisco Technology, Inc. Locally-updated interactive program guide
US7908625B2 (en) 2002-10-02 2011-03-15 Robertson Neil C Networked multimedia system
US7360235B2 (en) 2002-10-04 2008-04-15 Scientific-Atlanta, Inc. Systems and methods for operating a peripheral record/playback device in a networked multimedia system
US8046806B2 (en) 2002-10-04 2011-10-25 Wall William E Multiroom point of deployment module
US7545935B2 (en) * 2002-10-04 2009-06-09 Scientific-Atlanta, Inc. Networked multimedia overlay system
GB2394803A (en) * 2002-10-31 2004-05-05 Hewlett Packard Co Management of security key distribution using an ancestral hierarchy
US7305711B2 (en) * 2002-12-10 2007-12-04 Intel Corporation Public key media key block
US7450722B2 (en) * 2002-12-13 2008-11-11 General Instrument Corporation Subset difference method for multi-cast rekeying
US20040128259A1 (en) * 2002-12-31 2004-07-01 Blakeley Douglas Burnette Method for ensuring privacy in electronic transactions with session key blocks
US7801820B2 (en) * 2003-01-13 2010-09-21 Sony Corporation Real-time delivery of license for previously stored encrypted content
ES2352052T3 (en) * 2003-01-15 2011-02-15 Panasonic Corporation CONTENT PROTECTION SYSTEM, TERMINAL DEVICE, TERMINAL APPLIANCE METHOD AND REGISTRATION SUPPORT.
US7487532B2 (en) 2003-01-15 2009-02-03 Cisco Technology, Inc. Optimization of a full duplex wideband communications system
US8094640B2 (en) 2003-01-15 2012-01-10 Robertson Neil C Full duplex wideband communications system for a local coaxial network
JP2004220317A (en) * 2003-01-15 2004-08-05 Sony Corp Mutual authentication method, program, recording medium, signal processing system, reproduction device, and information processor
US8261063B2 (en) * 2003-02-03 2012-09-04 Hewlett-Packard Development Company, L.P. Method and apparatus for managing a hierarchy of nodes
JP3788438B2 (en) * 2003-03-24 2006-06-21 ソニー株式会社 Information recording medium, information processing apparatus, information processing method, and computer program
KR100974449B1 (en) * 2003-04-24 2010-08-10 엘지전자 주식회사 Method for managing a copy protection information of optical disc
KR20040092649A (en) * 2003-04-24 2004-11-04 엘지전자 주식회사 Method for managing a copy protection information of optical disc
KR100972831B1 (en) * 2003-04-24 2010-07-28 엘지전자 주식회사 Protectiog method of encrypted data and reprodecing apparatus therof
KR100974448B1 (en) * 2003-04-24 2010-08-10 엘지전자 주식회사 Method for managing a copy protection information of optical disc
WO2004107635A2 (en) * 2003-05-21 2004-12-09 Docomo Communications Laboratories Usa, Inc. Broadcast encryption using rsa
EP1629382A4 (en) * 2003-06-02 2011-12-21 Liquid Machines Inc Managing data objects in dynamic, distributed and collaborative contexts
CN1833400B (en) * 2003-08-05 2011-12-28 松下电器产业株式会社 Copyright protection system
US7610485B1 (en) * 2003-08-06 2009-10-27 Cisco Technology, Inc. System for providing secure multi-cast broadcasts over a network
JP2007505347A (en) * 2003-09-10 2007-03-08 コニンクリユケ フィリップス エレクトロニクス エヌ．ブイ． Content protection method and system
WO2005039100A1 (en) * 2003-10-16 2005-04-28 Matsushita Electric Industrial Co., Ltd. Encrypted communication system and communication device
KR20050078773A (en) * 2004-02-02 2005-08-08 삼성전자주식회사 Method of assigning user key for broadcast encryption
US7499550B2 (en) * 2004-02-09 2009-03-03 International Business Machines Corporation System and method for protecting a title key in a secure distribution system for recordable media content
JP4635459B2 (en) * 2004-03-15 2011-02-23 ソニー株式会社 Information processing method, decoding processing method, information processing apparatus, and computer program
JP2005286959A (en) * 2004-03-31 2005-10-13 Sony Corp Information processing method, decoding processing method, information processor and computer program
US8300824B1 (en) * 2004-04-08 2012-10-30 Cisco Technology, Inc. System and method for encrypting data using a cipher text in a communications environment
EP1745587A1 (en) * 2004-05-12 2007-01-24 Telefonaktiebolaget LM Ericsson (publ) Key management messages for secure broadcast
US8249258B2 (en) * 2004-06-07 2012-08-21 National Institute Of Information And Communications Technology Communication method and communication system using decentralized key management scheme
EP1762080A1 (en) * 2004-06-24 2007-03-14 International Business Machines Corporation Access control over multicast
JP4162237B2 (en) * 2004-06-24 2008-10-08 インターナショナル・ビジネス・マシーンズ・コーポレーション ENCRYPTED COMMUNICATION SYSTEM, ENCRYPTION DEVICE, DECRYPTION DEVICE, ENCRYPTION METHOD, DECRYPTION METHOD, ENCRYPTION PROGRAM, AND DECRYPTION PROGRAM
US7266548B2 (en) * 2004-06-30 2007-09-04 Microsoft Corporation Automated taxonomy generation
KR100579515B1 (en) * 2004-10-08 2006-05-15 삼성전자주식회사 Apparatus and method of generating a key for broadcast encryption
US7516326B2 (en) * 2004-10-15 2009-04-07 Hewlett-Packard Development Company, L.P. Authentication system and method
US7454021B2 (en) * 2004-10-29 2008-11-18 Hewlett-Packard Development Company, L.P. Off-loading data re-encryption in encrypted data management systems
CN101057445B (en) * 2004-11-16 2013-03-13 艾利森电话股份有限公司 Improved key distribution in systems for selective access to information
TWI277870B (en) * 2004-11-22 2007-04-01 Toshiba Corp Copyright management method, information recording/reproducing method and device, and information recording medium and method of manufacturing the medium
US8090105B2 (en) * 2004-11-24 2012-01-03 International Business Machines Corporation Broadcast encryption with dual tree sizes
US20060126831A1 (en) * 2004-12-14 2006-06-15 Cerruti Julian A Systems, methods, and media for adding an additional level of indirection to title key encryption
KR100811046B1 (en) * 2005-01-14 2008-03-06 엘지전자 주식회사 Method for managing digital rights of broadcast/multicast service
JP4599194B2 (en) * 2005-03-08 2010-12-15 株式会社東芝 Decoding device, decoding method, and program
KR100717005B1 (en) * 2005-04-06 2007-05-10 삼성전자주식회사 Method and apparatus for determining revocation key, and method and apparatus for decrypting thereby
EP1875660B1 (en) 2005-04-19 2018-10-24 Samsung Electronics Co., Ltd. Tag generation method in broadcast encryption system
KR100970391B1 (en) 2005-04-19 2010-07-15 삼성전자주식회사 Method for Making Tag in Broadcast Encryption System
KR100765750B1 (en) * 2005-05-09 2007-10-15 삼성전자주식회사 Method and apparatus for encrypting/decrypting efficiently according to broadcast encryption scheme
US20060265338A1 (en) * 2005-05-17 2006-11-23 Rutkowski Matt F System and method for usage based key management rebinding using logical partitions
KR100708134B1 (en) * 2005-05-25 2007-04-17 삼성전자주식회사 Method and apparatus for encrypting/decrypting efficiently according to broadcast encryption scheme
KR100708133B1 (en) * 2005-05-25 2007-04-17 삼성전자주식회사 Method and apparatus for encrypting/decrypting efficiently according to broadcast encryption scheme
KR101152311B1 (en) * 2005-06-09 2012-06-11 삼성전자주식회사 Key managing method in tree topology network for broadcast encryption
US20090210701A1 (en) * 2005-06-23 2009-08-20 Junbiao Zhang Multi-Media Access Device Registration System and Method
US20070011735A1 (en) * 2005-07-06 2007-01-11 Cable Television Laboratories, Inc. Open standard conditional access system
US7876998B2 (en) 2005-10-05 2011-01-25 Wall William E DVD playback over multi-room by copying to HDD
US7523304B2 (en) * 2005-11-22 2009-04-21 Ntt Docomo, Inc. Generation of set coverings with free riders, and generation of ordered sets of meeting points, in systems which include, but are not limited to, systems for broadcast encryption and systems for certificate revocation
KR100803596B1 (en) 2005-11-25 2008-02-19 삼성전자주식회사 Method and apparatus for decryption using external device or service on revocation mechanism, method and apparatus for supporting decryption therefor
US8306026B2 (en) * 2005-12-15 2012-11-06 Toshiba America Research, Inc. Last hop topology sensitive multicasting key management
US8176568B2 (en) 2005-12-30 2012-05-08 International Business Machines Corporation Tracing traitor coalitions and preventing piracy of digital content in a broadcast encryption system
US7860990B2 (en) 2006-01-31 2010-12-28 Genband Us Llc Session data records and related alarming within a session over internet protocol (SOIP) network
US7861003B2 (en) 2006-01-31 2010-12-28 Genband Us Llc Adaptive feedback for session over internet protocol
US7865612B2 (en) * 2006-01-31 2011-01-04 Genband Us Llc Method and apparatus for partitioning resources within a session-over-internet-protocol (SoIP) session controller
KR100729139B1 (en) * 2006-02-13 2007-06-18 고려대학교 산학협력단 Modular method for broadcast encryption
FR2897736B1 (en) * 2006-02-22 2008-04-11 Viaccess Sa METHOD FOR ESTABLISHING A CRYPTOGRAPHIC KEY, NET HEAD AND RECEIVER FOR THIS METHOD, AND METHOD FOR TRANSMITTING SIGNALS
FR2899748B1 (en) * 2006-04-07 2008-11-28 Thales Sa EFFICIENT HYBRID DIFFUSION SCHEME, ADAPTED TO LOW BANDWIDTH
CN101060398A (en) * 2006-04-20 2007-10-24 松下电器产业株式会社 A new safety group safety certificate generating method, communication method, and network system
US8676713B2 (en) * 2006-05-30 2014-03-18 Dell Products L.P. Dynamic constraints for content rights
EP2022207B1 (en) * 2006-05-31 2018-10-10 Orange Cryptographic method with integrated encryption and revocation, system, device and programs for implementing this method
JP2007336059A (en) * 2006-06-13 2007-12-27 Toshiba Corp Information access management method and apparatus
KR20070119335A (en) * 2006-06-15 2007-12-20 삼성전자주식회사 Method of allocating a key of user for broadcast encryption
JP5005277B2 (en) * 2006-07-13 2012-08-22 日東電工株式会社 Patches and patch preparations
KR101321971B1 (en) * 2006-07-24 2013-10-28 톰슨 라이센싱 Method, apparatus and system for secure distribution of content
JP4179563B2 (en) * 2006-09-21 2008-11-12 インターナショナル・ビジネス・マシーンズ・コーポレーション Technology for managing cryptographic keys for cryptographic communications
KR101377455B1 (en) * 2006-10-09 2014-04-02 삼성전자주식회사 Method and apparatus of generating encryption key for broadcast encryption
JP4984827B2 (en) * 2006-10-30 2012-07-25 ソニー株式会社 KEY GENERATION DEVICE, ENCRYPTION DEVICE, RECEPTION DEVICE, KEY GENERATION METHOD, ENCRYPTION METHOD, KEY PROCESSING METHOD, AND PROGRAM
JP2008113203A (en) * 2006-10-30 2008-05-15 Sony Corp Key generating device, encrypting device, receiver, key generation method, encryption method, key processing method, and program
US7986787B2 (en) * 2006-12-08 2011-07-26 International Business Machines Corporation System, method, and service for tracing traitors from content protection circumvention devices
US7978848B2 (en) * 2007-01-09 2011-07-12 Microsoft Corporation Content encryption schema for integrating digital rights management with encrypted multicast
KR20090000624A (en) * 2007-03-09 2009-01-08 삼성전자주식회사 Method for mutual authenticating with host device and system thereof
US7876895B2 (en) * 2007-05-09 2011-01-25 International Business Machines Corporation System, method, and service for performing unified broadcast encryption and traitor tracing for digital content
US7904717B2 (en) * 2007-06-19 2011-03-08 Oracle America, Inc. Method, apparatus, and manufacture for decryption of network traffic in a secure session
CA2693371C (en) * 2007-07-19 2013-12-10 Telcordia Technologies, Inc. Method for a public-key infrastructure providing communication integrity and anonymity while detecting malicious communication
JP5150175B2 (en) * 2007-09-05 2013-02-20 Ｋｄｄｉ株式会社 Client terminal covering method and program in SD method
US7912062B2 (en) 2007-09-28 2011-03-22 Genband Us Llc Methods and apparatus for managing addresses related to virtual partitions of a session exchange device
US8824685B2 (en) * 2007-10-15 2014-09-02 Sony Corporation Method for detection of a hacked decoder
JP2009105853A (en) * 2007-10-25 2009-05-14 Kddi Corp Sd method corresponding to optional tree structure, and program
EP2068490A1 (en) 2007-12-05 2009-06-10 Nagravision S.A. Method to generate a private key in a Boneh-Franklin scheme
EP2073431A1 (en) 2007-12-21 2009-06-24 Nagravision S.A. Method to trace traceable parts of original private keys in a public-key cryptosystem
US7936882B2 (en) * 2008-01-17 2011-05-03 Nagravision S.A. Method to trace traceable parts of original private keys in a public-key cryptosystem
US8306220B2 (en) * 2008-01-17 2012-11-06 Nagravision S.A. Method to generate a private key in a boneh-franklin scheme
RU2010134428A (en) * 2008-01-18 2012-02-27 Конинклейке Филипс Электроникс Н.В. (Nl) WIRELESS COMMUNICATION SYSTEM AND METHOD OF AUTOMATIC CANCELLATION OF THE NODE AND KEY
US8499149B2 (en) * 2008-02-20 2013-07-30 Hewlett-Packard Development Company, L.P. Revocation for direct anonymous attestation
US9729316B2 (en) 2008-02-27 2017-08-08 International Business Machines Corporation Unified broadcast encryption system
US8391493B2 (en) * 2008-02-29 2013-03-05 The Boeing Company Probabilistic mitigation of control channel jamming via random key distribution in wireless communications networks
EP2279630A4 (en) 2008-04-24 2015-03-11 Nokia Corp Mehtod, apparatus, and computer program product for providing internet protocol multicast transport
KR20090115565A (en) * 2008-05-02 2009-11-05 삼성전자주식회사 Method for transmitting content key and apparatus therefor
US8108928B2 (en) * 2008-06-20 2012-01-31 International Business Machines Corporation Adaptive traitor tracing
US8122501B2 (en) * 2008-06-20 2012-02-21 International Business Machines Corporation Traitor detection for multilevel assignment
US8422684B2 (en) * 2008-08-15 2013-04-16 International Business Machines Corporation Security classes in a media key block
US20100054479A1 (en) * 2008-09-02 2010-03-04 Industrial Technology Research Institute Drm key management system using multi-dimensional grouping techniques
US8189789B2 (en) * 2008-11-03 2012-05-29 Telcordia Technologies, Inc. Intrusion-tolerant group management for mobile ad-hoc networks
US8347081B2 (en) 2008-12-10 2013-01-01 Silicon Image, Inc. Method, apparatus and system for employing a content protection system
US8594334B2 (en) * 2008-12-23 2013-11-26 Telefonaktiebolaget L M Ericsson (Publ) Key management method
US8571209B2 (en) 2009-01-19 2013-10-29 International Business Machines Recording keys in a broadcast-encryption-based system
KR101603133B1 (en) * 2009-09-21 2016-03-14 삼성전자주식회사 Apparatus and method for reducing the channel play time in portable terminal
US8254580B2 (en) * 2009-09-30 2012-08-28 Telefonaktiebolaget L M Ericsson (Publ) Key distribution in a hierarchy of nodes
CN102725737B (en) * 2009-12-04 2016-04-20 密码研究公司 The encryption and decryption of anti-leak can be verified
EP2355503A1 (en) * 2010-02-04 2011-08-10 Nagravision S.A. Method to manage members of at least one group of decoders having access to audio/video data
WO2011107451A1 (en) * 2010-03-03 2011-09-09 Nagravision S.A. Method to manage revocations in a group of terminals
CN102195775B (en) * 2010-03-15 2016-03-02 中兴通讯股份有限公司 A kind of encryption and decryption method of cloud computing key and device
US8396896B2 (en) 2010-11-10 2013-03-12 International Business Machines Corporation Assigning resources to a binary tree structure
JP5676331B2 (en) * 2011-03-24 2015-02-25 株式会社東芝 Root node and program
WO2013095521A1 (en) 2011-12-22 2013-06-27 Intel Corporation Instructions processors, methods, and systems to process blake secure hashing algorithm
CN104396183B (en) * 2012-05-29 2017-09-22 Abb技术股份公司 Method and system for firmware or software to be sent to multiple equipment
US8782440B2 (en) 2012-08-15 2014-07-15 International Business Machines Corporation Extending the number of applications for accessing protected content in a media using media key blocks
US20150237400A1 (en) * 2013-01-05 2015-08-20 Benedict Ow Secured file distribution system and method
US9425967B2 (en) * 2013-03-20 2016-08-23 Industrial Technology Research Institute Method for certificate generation and revocation with privacy preservation
GB2528874A (en) * 2014-08-01 2016-02-10 Bae Systems Plc Improvements in and relating to secret communications
US9639687B2 (en) 2014-11-18 2017-05-02 Cloudfare, Inc. Multiply-encrypting data requiring multiple keys for decryption
JP5845333B2 (en) * 2014-12-24 2016-01-20 株式会社東芝 Management apparatus, system, and method
US10333696B2 (en) 2015-01-12 2019-06-25 X-Prime, Inc. Systems and methods for implementing an efficient, scalable homomorphic transformation of encrypted data with minimal data expansion and improved processing efficiency
JP6271808B2 (en) * 2015-03-16 2018-01-31 株式会社東芝 Management apparatus, program, system and method
US10333909B2 (en) 2016-02-09 2019-06-25 Conduent Business Services, Llc Methods and systems for broadcasting targeted advertisements to mobile device
CN106878002B (en) 2016-07-05 2020-04-24 阿里巴巴集团控股有限公司 Permission revocation method and device
US11290262B2 (en) * 2017-07-18 2022-03-29 Legic Identsystems Ag Method and devices for communicating securely between devices
EP3462571A1 (en) 2017-09-28 2019-04-03 Koninklijke Philips N.V. Authentication in a wireless power transfer system
JP2018038077A (en) * 2017-11-02 2018-03-08 株式会社東芝 Management device, program, system, and method
CN109067520B (en) * 2018-07-26 2020-06-05 北京航空航天大学 Revocable broadcast encryption method and system based on hierarchical identity
US10841078B2 (en) * 2018-07-26 2020-11-17 International Business Machines Corporation Encryption key block generation with barrier descriptors
CN110858835B (en) * 2018-08-24 2022-02-18 中国电信股份有限公司 Communication method, system and related device and computer readable storage medium
US11876903B2 (en) 2020-12-09 2024-01-16 International Business Machines Corporation Decentralized broadcast encryption and key generation facility
US11558185B2 (en) 2021-03-19 2023-01-17 Raytheon Bbn Technologies Corp. Stream-based key management
US11804949B2 (en) * 2021-03-19 2023-10-31 Raytheon Bbn Technologies Corp. Subscriber revocation in a publish-subscribe network using attribute-based encryption

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0641103A2 (en) * 1993-08-25 1995-03-01 ALGORITHMIC RESEARCH Ltd. Method and apparatus for key distribution in a selective braodcasting system

Family Cites Families (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5241597A (en) * 1991-02-01 1993-08-31 Motorola, Inc. Method for recovering from encryption key variable loss
US6560340B1 (en) * 1995-04-03 2003-05-06 Scientific-Atlanta, Inc. Method and apparatus for geographically limiting service in a conditional access system
US5675649A (en) * 1995-11-30 1997-10-07 Electronic Data Systems Corporation Process for cryptographic key generation and safekeeping
US5812670A (en) * 1995-12-28 1998-09-22 Micali; Silvio Traceable anonymous transactions
US5748736A (en) * 1996-06-14 1998-05-05 Mittra; Suvo System and method for secure group communications via multicast or broadcast
FR2751817B1 (en) 1996-07-29 1998-09-11 Thomson Multimedia Sa CONDITIONAL ACCESS SYSTEM USING MULTIPLE ENCRYPTION KEY MESSAGES
DE19649292A1 (en) * 1996-11-28 1998-06-04 Deutsche Telekom Ag Access protection method for pay television
US6285991B1 (en) * 1996-12-13 2001-09-04 Visa International Service Association Secure interactive electronic account statement delivery system
US5920861A (en) * 1997-02-25 1999-07-06 Intertrust Technologies Corp. Techniques for defining using and manipulating rights management data structures
US6690795B1 (en) * 1997-03-04 2004-02-10 Lucent Technologies Inc. Multiple keys for decrypting data in restricted-access television system
JP3864401B2 (en) * 1997-04-23 2006-12-27 ソニー株式会社 Authentication system, electronic device, authentication method, and recording medium
US6775382B1 (en) * 1997-06-30 2004-08-10 Sun Microsystems, Inc. Method and apparatus for recovering encryption session keys
US6397329B1 (en) * 1997-11-21 2002-05-28 Telcordia Technologies, Inc. Method for efficiently revoking digital identities
US6098056A (en) * 1997-11-24 2000-08-01 International Business Machines Corporation System and method for controlling access rights to and security of digital content in a distributed information system, e.g., Internet
US6247127B1 (en) * 1997-12-19 2001-06-12 Entrust Technologies Ltd. Method and apparatus for providing off-line secure communications
JPH11187013A (en) 1997-12-24 1999-07-09 Ibm Japan Ltd Cryptographic key distribution system
US6084969A (en) * 1997-12-31 2000-07-04 V-One Corporation Key encryption system and method, pager unit, and pager proxy for a two-way alphanumeric pager network
US6049878A (en) * 1998-01-20 2000-04-11 Sun Microsystems, Inc. Efficient, secure multicasting with global knowledge
US6118873A (en) * 1998-04-24 2000-09-12 International Business Machines Corporation System for encrypting broadcast programs in the presence of compromised receiver devices
JP4273535B2 (en) * 1998-05-12 2009-06-03 ソニー株式会社 Data transmission control method, data transmission system, data receiving apparatus and data transmitting apparatus
IL126472A0 (en) * 1998-10-07 1999-08-17 Nds Ltd Secure communications system
US6782475B1 (en) * 1999-01-15 2004-08-24 Terence E. Sumner Method and apparatus for conveying a private message to selected members
JP4214651B2 (en) * 1999-03-31 2009-01-28 ソニー株式会社 Data communication system and data management method
US6636968B1 (en) * 1999-03-25 2003-10-21 Koninklijke Philips Electronics N.V. Multi-node encryption and key delivery
US6263435B1 (en) * 1999-07-06 2001-07-17 Matsushita Electric Industrial Co., Ltd. Dual encryption protocol for scalable secure group communication
US6684331B1 (en) * 1999-12-22 2004-01-27 Cisco Technology, Inc. Method and apparatus for distributing and updating group controllers over a wide area network using a tree structure
JP4023083B2 (en) 2000-04-06 2007-12-19 ソニー株式会社 Information processing system, information processing method, information recording medium, and program providing medium
US7200230B2 (en) * 2000-04-06 2007-04-03 Macrovision Corporation System and method for controlling and enforcing access rights to encrypted media
JP2001352321A (en) 2000-04-06 2001-12-21 Sony Corp Information processing system, information processing method, and information recording medium, and program providing medium
US6961858B2 (en) * 2000-06-16 2005-11-01 Entriq, Inc. Method and system to secure content for distribution via a network
US6839436B1 (en) * 2000-10-16 2005-01-04 Lucent Technologies Inc. Method for providing long-lived broadcast encrypton
US20020174366A1 (en) * 2000-10-26 2002-11-21 General Instrument, Inc. Enforcement of content rights and conditions for multimedia content
JP2002281013A (en) 2000-12-18 2002-09-27 Matsushita Electric Ind Co Ltd Key management device for protecting copyright, recording medium, reproduction device, recording device, key management method, reproduction method, key management program, and computer readable recording medium with key management program recorded
ATE488094T1 (en) * 2000-12-22 2010-11-15 Irdeto Eindhoven B V CONDITIONAL ACCESS SYSTEM
US7039803B2 (en) * 2001-01-26 2006-05-02 International Business Machines Corporation Method for broadcast encryption and key revocation of stateless receivers
JP2003050745A (en) * 2001-08-07 2003-02-21 Sony Corp Information processor, information processing method and computer program
US20030200548A1 (en) * 2001-12-27 2003-10-23 Paul Baran Method and apparatus for viewer control of digital TV program start time

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0641103A2 (en) * 1993-08-25 1995-03-01 ALGORITHMIC RESEARCH Ltd. Method and apparatus for key distribution in a selective braodcasting system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ABDALLA M ET AL: "KEY MANAGEMENT FOR RESTRICTED MULTICAST USING BROADCAST ENCRYPTION", IEEE / ACM TRANSACTIONS ON NETWORKING, IEEE INC. NEW YORK, US, VOL. 8, NR. 4, PAGE(S) 443-454, ISSN: 1063-6692, XP000959120 *
BLUNDO C ET AL: "TRADE-OFFS BETWEEN COMMUNICATION AND STORAGE IN UNCONDITIONALLY SECURE SCHEMES FOR BROADCAST ENCRYPTION AND INTERACTIVE KEY DISTRIBUTION", ADVANCES IN CRYPTOLOGY - CRYPTO '96. 16TH. ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE. SANTA BARBARA, AUG. 18 - 22, 1996. PROCEEDINGS, PROCEEDINGS OF THE ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE (CRYPTO), BERLIN, SPRINGER, DE, VOL. CONF. 16, PAGE(S, ISBN: 3-540-61512-1, XP000626596 *
CHOR B ET AL: "Tracing traitors", ADVANCES IN CRYPTOLOGY (CRYPTO). SANTA BARBARA, AUG. 21 - 25, 1994, PROCEEDINGS OF THE ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE (CRYPTO), BERLIN, SPRINGER, DE, VOL. CONF. 14, PAGE(S) 257-270, ISBN: 3-540-58333-5, XP002097845 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8144869B2 (en) 2003-01-15 2012-03-27 Panasonic Corporation Content protection system, key data generation apparatus, and terminal apparatus

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