GB2394629B - Key management for content protection - Google Patents
Key management for content protectionInfo
- Publication number
- GB2394629B GB2394629B GB0401092A GB0401092A GB2394629B GB 2394629 B GB2394629 B GB 2394629B GB 0401092 A GB0401092 A GB 0401092A GB 0401092 A GB0401092 A GB 0401092A GB 2394629 B GB2394629 B GB 2394629B
- Authority
- GB
- United Kingdom
- Prior art keywords
- key management
- content protection
- protection
- content
- management
- 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
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
- 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
- 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
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL130963A IL130963A (en) | 1999-07-15 | 1999-07-15 | Key management for content protection |
US09/502,867 US6880081B1 (en) | 1999-07-15 | 2000-02-11 | Key management for content protection |
GB0015857A GB2353682B (en) | 1999-07-15 | 2000-06-28 | Key management for content protection |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0401092D0 GB0401092D0 (en) | 2004-02-18 |
GB2394629A GB2394629A (en) | 2004-04-28 |
GB2394629B true GB2394629B (en) | 2004-06-09 |
Family
ID=29783026
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0325825A Expired - Lifetime GB2391142B (en) | 1999-07-15 | 2000-06-28 | Key management for content protection |
GB0401092A Expired - Lifetime GB2394629B (en) | 1999-07-15 | 2000-06-28 | Key management for content protection |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0325825A Expired - Lifetime GB2391142B (en) | 1999-07-15 | 2000-06-28 | Key management for content protection |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB2391142B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7634223B2 (en) | 2004-07-12 | 2009-12-15 | Motorola Inc. | Method and apparatus for controlling a delivery of a broadcast-multicast flow in a packet data communication system |
CN101164274B (en) | 2005-04-25 | 2011-01-26 | 诺基亚公司 | Group key generating method and device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0207534A1 (en) * | 1985-04-29 | 1987-01-07 | Koninklijke Philips Electronics N.V. | System for storing and distributing keys for cryptographically protected communication |
EP0781003A2 (en) * | 1995-12-22 | 1997-06-25 | General Instrument Corporation Of Delaware | Generation of cryptographic signatures using hash keys |
WO2001003365A1 (en) * | 1999-07-06 | 2001-01-11 | Matsushita Electric Industrial Co., Ltd. | Distributed group key management scheme for secure many-to-many communication |
-
2000
- 2000-06-28 GB GB0325825A patent/GB2391142B/en not_active Expired - Lifetime
- 2000-06-28 GB GB0401092A patent/GB2394629B/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0207534A1 (en) * | 1985-04-29 | 1987-01-07 | Koninklijke Philips Electronics N.V. | System for storing and distributing keys for cryptographically protected communication |
EP0781003A2 (en) * | 1995-12-22 | 1997-06-25 | General Instrument Corporation Of Delaware | Generation of cryptographic signatures using hash keys |
WO2001003365A1 (en) * | 1999-07-06 | 2001-01-11 | Matsushita Electric Industrial Co., Ltd. | Distributed group key management scheme for secure many-to-many communication |
Also Published As
Publication number | Publication date |
---|---|
GB0325825D0 (en) | 2003-12-10 |
GB2391142A (en) | 2004-01-28 |
GB2391142B (en) | 2004-03-31 |
GB0401092D0 (en) | 2004-02-18 |
GB2394629A (en) | 2004-04-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20090528 AND 20090603 |
|
PE20 | Patent expired after termination of 20 years |
Expiry date: 20200627 |