EP1348276A2 - Threshold cryptography scheme for conditional access systems - Google Patents

Threshold cryptography scheme for conditional access systems

Info

Publication number
EP1348276A2
EP1348276A2 EP01977153A EP01977153A EP1348276A2 EP 1348276 A2 EP1348276 A2 EP 1348276A2 EP 01977153 A EP01977153 A EP 01977153A EP 01977153 A EP01977153 A EP 01977153A EP 1348276 A2 EP1348276 A2 EP 1348276A2
Authority
EP
European Patent Office
Prior art keywords
share
shares
signal
smart card
scrambling key
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.)
Withdrawn
Application number
EP01977153A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ahmet Mursit Eskicioglu
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.)
THOMSON LICENSING
Original Assignee
Thomson Licensing SAS
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 Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of EP1348276A2 publication Critical patent/EP1348276A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • 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
    • H04L9/08—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
    • H04L9/085—Secret sharing or secret splitting, e.g. threshold schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25808—Management of client data
    • H04N21/25816—Management of client data involving client authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
EP01977153A 2000-11-29 2001-09-24 Threshold cryptography scheme for conditional access systems Withdrawn EP1348276A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US25378100P 2000-11-29 2000-11-29
US253781P 2000-11-29
PCT/US2001/029790 WO2002045337A2 (en) 2000-11-29 2001-09-24 Threshold cryptography scheme for conditional access systems

Publications (1)

Publication Number Publication Date
EP1348276A2 true EP1348276A2 (en) 2003-10-01

Family

ID=22961673

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01977153A Withdrawn EP1348276A2 (en) 2000-11-29 2001-09-24 Threshold cryptography scheme for conditional access systems
EP01981324A Withdrawn EP1366594A2 (en) 2000-11-29 2001-09-24 Threshold cryptography scheme for message authentication systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP01981324A Withdrawn EP1366594A2 (en) 2000-11-29 2001-09-24 Threshold cryptography scheme for message authentication systems

Country Status (8)

Country Link
EP (2) EP1348276A2 (ja)
JP (2) JP2004515160A (ja)
KR (2) KR20030094217A (ja)
CN (2) CN1483259A (ja)
AU (2) AU2002212977A1 (ja)
BR (2) BR0115575A (ja)
MX (2) MXPA03004599A (ja)
WO (2) WO2002045340A2 (ja)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7594275B2 (en) * 2003-10-14 2009-09-22 Microsoft Corporation Digital rights management system
US7620187B1 (en) 2005-03-30 2009-11-17 Rockwell Collins, Inc. Method and apparatus for ad hoc cryptographic key transfer
RU2420895C2 (ru) * 2005-06-08 2011-06-10 Конинклейке Филипс Электроникс Н.В. Детерминистическое предварительное распределение ключей и функциональное управление ключами для сетей мобильных датчиков на теле
JP4776378B2 (ja) * 2006-01-11 2011-09-21 日本電信電話株式会社 複数鍵認証端末装置及び複数鍵認証管理装置及び複数鍵認証システム及びプログラム
JP4916915B2 (ja) * 2007-02-28 2012-04-18 Ｋｄｄｉ株式会社 端末装置、データ管理装置およびコンピュータプログラム
JP4909796B2 (ja) * 2007-04-24 2012-04-04 Ｋｄｄｉ株式会社 秘密情報管理システム、秘密情報管理方法およびプログラム
GB2451505A (en) 2007-08-01 2009-02-04 Iti Scotland Ltd Key distribution in a network using key shares in a secret sharing scheme
US7958354B1 (en) 2008-02-14 2011-06-07 Rockwell Collins, Inc. High-order knowledge sharing system to distribute secret data
JP2008167505A (ja) * 2008-03-26 2008-07-17 Dainippon Printing Co Ltd 公開鍵暗号処理システムおよび方法
JP5608509B2 (ja) * 2010-10-21 2014-10-15 Ｋｄｄｉ株式会社 鍵管理システム、鍵管理方法及びコンピュータプログラム
WO2017130200A1 (en) * 2016-01-27 2017-08-03 Secret Double Octopus Ltd System and method for securing a communication channel
US11170094B2 (en) 2016-01-27 2021-11-09 Secret Double Octopus Ltd. System and method for securing a communication channel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7610614B1 (en) * 1999-02-17 2009-10-27 Certco, Inc. Cryptographic control and maintenance of organizational structure and functions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0245337A2 *

Also Published As

Publication number Publication date
BR0115573A (pt) 2003-07-29
CN1484901A (zh) 2004-03-24
EP1366594A2 (en) 2003-12-03
MXPA03004599A (es) 2003-09-04
KR20030094217A (ko) 2003-12-11
MXPA03004822A (es) 2003-09-25
WO2002045340A2 (en) 2002-06-06
BR0115575A (pt) 2003-07-29
JP2004515160A (ja) 2004-05-20
JP2004515159A (ja) 2004-05-20
AU2001296294A1 (en) 2002-06-11
CN1483259A (zh) 2004-03-17
WO2002045337A2 (en) 2002-06-06
KR20040010565A (ko) 2004-01-31
WO2002045340A3 (en) 2002-10-17
AU2002212977A1 (en) 2002-06-11
WO2002045337A3 (en) 2002-09-06

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Legal Events

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Effective date: 20040930

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: THOMSON LICENSING

RAP1 Party data changed (applicant data changed or rights of an application transferred)

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STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 20100223