KR100971992B1 - 그룹 키 생성을 위한 방법 및 장치 - Google Patents
그룹 키 생성을 위한 방법 및 장치 Download PDFInfo
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- KR100971992B1 KR100971992B1 KR1020077027203A KR20077027203A KR100971992B1 KR 100971992 B1 KR100971992 B1 KR 100971992B1 KR 1020077027203 A KR1020077027203 A KR 1020077027203A KR 20077027203 A KR20077027203 A KR 20077027203A KR 100971992 B1 KR100971992 B1 KR 100971992B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
- H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
- H04H60/23—Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
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- 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
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- 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
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
- H04L9/0637—Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]
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- 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
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- 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
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0877—Generation of secret information including derivation or calculation of cryptographic keys or passwords using additional device, e.g. trusted platform module [TPM], smartcard, USB or hardware security module [HSM]
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- 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
- H04L9/0894—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
- H04L9/0897—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage involving additional devices, e.g. trusted platform module [TPM], smartcard or USB
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- 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
- H04L9/3236—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 cryptographic hash functions
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- 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
- H04N21/26613—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 keys in general
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- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/633—Control signals issued by server directed to the network components or client
- H04N21/6332—Control signals issued by server directed to the network components or client directed to client
- H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
- H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
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- 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
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Databases & Information Systems (AREA)
- Theoretical Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Storage Device Security (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
Description
Claims (11)
- 그룹 키 생성 방법에 있어서,수신기들의 집합에 대하여, 미리 정의된 상수인 k 보다 더 적은 구성원들을 갖는 수신기들의 각각의 가능한 부분집합 X에 대하여 콤포넌트 키를 제공하는 단계;상기 부분집합들 X를 배열하는 반복 배열 함수를 정의하는 단계;권한이 부여된 수신기들의 부분집합에 대하여, 어떤 부분집합들 X가 권한이 부여된 부분집합의 구성원들을 포함하지 않는지를 결정하고 각각의 그러한 부분집합 X와 관련된 상기 콤포넌트 키들을 식별하는 단계;입력 및 출력 그룹 키로서 콤포넌트 키들의 임의의 수를 취하는 의사 무작위 함수를 정의하는 단계; 및상기 권한이 부여된 부분집합의 구성원들을 포함하지 않는 k보다 작은 크기의 X의 부분집합들과 관련된 상기 콤포넌트 키들을 상기 의사 무작위 함수에 입력으로서 이용하는 단계를 포함하고,상기 콤포넌트 키들은 상기 반복 배열 함수에 의하여 주어진 순서로 상기 의사 무작위 함수에 적용되고 상기 의사 무작위 함수의 출력은 권한이 부여된 수신기에 특정된 그룹 키인 것을 특징으로 하는 그룹 키 생성 방법.
- 제1항에 있어서,각각의 부분집합 X에 콤포넌트 키들을 할당하는 추가적인 반복 배열 함수를 더 포함하는 것을 특징으로 하는 그룹 키 생성 방법.
- 제1항에 있어서, 상기 방법은 상기 수신기에 의하여 수행되고, 상기 수신기는 자신이 상기 권한이 부여된 부분집합의 구성원인 경우에만 오직 상기 방법을 수행하는 것을 특징으로 하는 그룹 키 생성 방법.
- 제1항에 있어서, 상기 의사 무작위 함수는 AES-XCBC-MAC에 기반을 둔 것을 특징으로 하는 그룹 키 생성 방법.
- 제1항에 있어서, 상기 의사 무작위 함수는 HMAC_SHA1에 기반을 둔 것을 특징으로 하는 그룹 키 생성 방법.
- 제1항에 있어서, 상기 의사 무작위 함수는 추가적인 솔트(salt) 파라미터를 취하는 것을 특징으로 하는 그룹 키 생성 방법.
- 수신기에 있어서,저장부 및 로직을 포함하는 변조 방지 환경; 및상기 변조 방지 환경에 저장된 복수의 콤포넌트 키들 및 장치 ID로서, 상기 수신기를 포함하지 않는 각각의 가능한 부분집합 X에 상응하는 적어도 하나의 콤포넌트 키가 있고, 상기 부분집합들 X는 k보다 적은 구성원들을 갖는 수신기들의 모든 집합을 나타내는 복수의 콤포넌트 키들 및 장치 ID를 포함하고,권한이 부여된 그룹 정의의 수신에 따라, 상기 변조 방지 환경의 로직은 상기 권한이 부여된 그룹의 구성원들을 포함하지 않는 부분집합들 X를 결정하고, 각각의 그러한 그룹은 주사 배열(injective ordering) 함수에 의하여 결정된 것과 같이 배열되고, 상기 배열된 그룹들과 관련된 콤포넌트 키들은 의사 무작위 함수에 대한 파라미터들로서 이용되고 상기 배열 함수에 의하여 표시된 순서로 적용되고;상기 의사 무작위 함수의 출력은 권한이 부여된 그룹 키인 것을 특징으로 하는 수신기.
- 제7항에 있어서, 상기 의사 무작위 함수는 AES-XCBC_MAC에 기반을 둔 것을 특징으로 하는 수신기.
- 제7항에 있어서, 상기 의사 무작위 함수는 HMAC_SHA1에 기반을 둔 것을 특징으로 하는 수신기.
- 제7항에 있어서, 상기 의사 무작위 함수는 추가적인 솔트 파라미터를 취하는 것을 특징으로 하는 수신기.
- 그룹 키 생성을 제공하는 프로그램 제품에 있어서,컴퓨터로 판독 가능한 매체;부분집합들 X를 배열하는 반복 배열 함수를 정의하는 상기 컴퓨터로 판독 가능한 매체에 저장된 프로그램 코드로서, 부분집합들 X는 미리 지정된 수보다 적은 구성원들을 갖는 모든 수신기들의 집합의 부분집합들인 프로그램 코드;그룹 정의의 수신에 따라 어떤 부분집합들 X가 상기 그룹 정의 내의 구성원들을 포함하지 않는지 결정하고 각각의 그러한 부분집합 X와 관련된 키를 식별하는 상기 컴퓨터로 판독 가능한 매체에 저장된 프로그램 코드;입력 및 출력 그룹 키로서 콤포넌트 키들의 임의의 수를 취하는 의사 무작위 함수를 포함하는 상기 컴퓨터로 판독 가능한 매체에 저장된 프로그램 코드; 및상기 의사 무작위 함수에 대한 입력으로서 상기 그룹 정의 내의 구성원들을 포함하지 않는 X의 부분집합들과 관련된 상기 콤포넌트 키들을 이용하는 상기 컴퓨터로 판독 가능한 매체에 저장된 프로그램 코드를 포함하고,상기 콤포넌트 키들은 상기 반복 배열 함수에 의하여 주어진 순서로 상기 의사 무작위 함수에 적용되고 상기 의사 무작위 함수의 출력은 권한이 부여된 수신기에 특정된 그룹 키인 것을 특징으로 하는 그룹 키 생성을 제공하는 프로그램 제품.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US67495905P | 2005-04-25 | 2005-04-25 | |
US60/674,959 | 2005-04-25 |
Publications (2)
Publication Number | Publication Date |
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KR20080004625A KR20080004625A (ko) | 2008-01-09 |
KR100971992B1 true KR100971992B1 (ko) | 2010-07-22 |
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Application Number | Title | Priority Date | Filing Date |
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KR1020077027203A KR100971992B1 (ko) | 2005-04-25 | 2006-04-24 | 그룹 키 생성을 위한 방법 및 장치 |
Country Status (9)
Country | Link |
---|---|
US (1) | US8391478B2 (ko) |
EP (1) | EP1875655B1 (ko) |
JP (1) | JP2008538875A (ko) |
KR (1) | KR100971992B1 (ko) |
CN (1) | CN101164274B (ko) |
BR (1) | BRPI0610402A2 (ko) |
MX (1) | MX2007012748A (ko) |
WO (1) | WO2006114684A2 (ko) |
ZA (1) | ZA200710089B (ko) |
Families Citing this family (12)
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US8233623B2 (en) * | 2006-05-08 | 2012-07-31 | Qualcomm Incorporated | Methods and systems for blackout provisioning in a distribution network |
EP1998488A1 (de) * | 2007-05-26 | 2008-12-03 | DSI Informationstechnik GmbH | Personalisierte AES Verschlüsselung |
US20110099362A1 (en) * | 2008-06-23 | 2011-04-28 | Tomoyuki Haga | Information processing device, encryption key management method, computer program and integrated circuit |
JP5500923B2 (ja) * | 2008-11-27 | 2014-05-21 | キヤノン株式会社 | 情報処理装置 |
US8510552B2 (en) | 2010-04-07 | 2013-08-13 | Apple Inc. | System and method for file-level data protection |
US8788842B2 (en) * | 2010-04-07 | 2014-07-22 | Apple Inc. | System and method for content protection based on a combination of a user PIN and a device specific identifier |
CN102468955B (zh) * | 2010-11-15 | 2014-10-08 | 中国移动通信集团公司 | 物联网中用户组的成员节点与网络侧通信的方法和设备 |
US8751804B1 (en) * | 2011-06-30 | 2014-06-10 | Decho Corporation | Controlling access to data within encrypted copies of files using salt parameters |
US9215076B1 (en) | 2012-03-27 | 2015-12-15 | Amazon Technologies, Inc. | Key generation for hierarchical data access |
US8892865B1 (en) | 2012-03-27 | 2014-11-18 | Amazon Technologies, Inc. | Multiple authority key derivation |
CN103281570B (zh) * | 2013-04-25 | 2016-04-20 | 河海大学 | 免费接收者数量可控的广播加密方法 |
US10944557B2 (en) * | 2018-04-25 | 2021-03-09 | Nxp B.V. | Secure activation of functionality in a data processing system |
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- 2006-04-24 MX MX2007012748A patent/MX2007012748A/es active IP Right Grant
- 2006-04-24 CN CN2006800137830A patent/CN101164274B/zh not_active Expired - Fee Related
- 2006-04-24 US US11/379,813 patent/US8391478B2/en not_active Expired - Fee Related
- 2006-04-24 KR KR1020077027203A patent/KR100971992B1/ko active IP Right Grant
- 2006-04-24 JP JP2008507190A patent/JP2008538875A/ja active Pending
- 2006-04-24 EP EP06744551.0A patent/EP1875655B1/en not_active Not-in-force
- 2006-04-24 BR BRPI0610402-9A patent/BRPI0610402A2/pt active Search and Examination
- 2006-04-24 WO PCT/IB2006/000992 patent/WO2006114684A2/en not_active Application Discontinuation
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- 2007-11-22 ZA ZA200710089A patent/ZA200710089B/xx unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20040037424A1 (en) | 2002-06-24 | 2004-02-26 | International Business Machines Corporation | Information distribution and processing |
US20040120529A1 (en) | 2002-09-23 | 2004-06-24 | International Business Machines Corporation | Key distribution in a conditional access system |
Also Published As
Publication number | Publication date |
---|---|
US8391478B2 (en) | 2013-03-05 |
EP1875655A2 (en) | 2008-01-09 |
KR20080004625A (ko) | 2008-01-09 |
JP2008538875A (ja) | 2008-11-06 |
WO2006114684A2 (en) | 2006-11-02 |
MX2007012748A (es) | 2008-01-14 |
EP1875655B1 (en) | 2017-08-16 |
WO2006114684A3 (en) | 2007-01-18 |
CN101164274B (zh) | 2011-01-26 |
US20070189540A1 (en) | 2007-08-16 |
EP1875655A4 (en) | 2013-12-18 |
CN101164274A (zh) | 2008-04-16 |
BRPI0610402A2 (pt) | 2012-01-10 |
ZA200710089B (en) | 2009-07-29 |
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