Invention Grant
US07804958B2 Super encrypted storage and retrieval of media programs with smartcard generated keys
有权
使用智能卡生成的密钥超级加密存储和检索媒体节目
- Patent Title: Super encrypted storage and retrieval of media programs with smartcard generated keys
- Patent Title (中): 使用智能卡生成的密钥超级加密存储和检索媒体节目
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Application No.: US12184957Application Date: 2008-08-01
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Publication No.: US07804958B2Publication Date: 2010-09-28
- Inventor: Raynold M. Kahn , Gregory J. Gagnon , David D. Ha , Peter M. Klauss , Christopher P. Curren , Thomas H. James
- Applicant: Raynold M. Kahn , Gregory J. Gagnon , David D. Ha , Peter M. Klauss , Christopher P. Curren , Thomas H. James
- Applicant Address: US CA El Segundo
- Assignee: The DIRECTV Group, Inc.
- Current Assignee: The DIRECTV Group, Inc.
- Current Assignee Address: US CA El Segundo
- Main IPC: H04N7/167
- IPC: H04N7/167

Abstract:
A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. In summary, the present invention describes a system and method for storing and retrieving program material for subsequent replay. The method comprises the steps of accepting encrypted access control information and the program material encrypted according to a first encryption key, the access control information including a first encryption key and control data; decrypting the received access control information to produce the first encryption key; decrypting the program material using the first encryption key; re-encrypting the program material using according to a second encryption key; encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and providing the re-encrypted program material and a fourth encryption key for storage. The apparatus comprises a conditional access module, for accepting encrypted access control information and the program material encrypted according to a first encryption key, the encrypted access control information including the first encryption key and temporally-variant control data, the control access module comprising a first decryption module, for decrypting the access control information to produce the first encryption key; a first encryption module, for encrypting a second encryption key with a third encryption key to produce a fourth encryption key; and a second decryption module for decrypting the fourth encryption key to produce the second encryption key.
Public/Granted literature
- US20080313474A1 SUPER ENCRYPTED STORAGE AND RETRIEVAL OF MEDIA PROGRAMS WITH SMARTCARD GENERATED KEYS Public/Granted day:2008-12-18
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