Invention Grant
US08509444B2 Scramble key management unit, scramble key management information transmitting unit, method for scramble key output management, scramble key management program, license information management unit, license management information transmitting unit, method for license information output management, and license information management program
有权
争用密钥管理单元，加密密钥管理信息发送单元，加密密钥输出管理方法，加密密钥管理程序，许可证信息管理单元，许可证管理信息发送单元，许可信息输出管理方法，许可信息管理程序
- Patent Title: Scramble key management unit, scramble key management information transmitting unit, method for scramble key output management, scramble key management program, license information management unit, license management information transmitting unit, method for license information output management, and license information management program
- Patent Title (中): 争用密钥管理单元，加密密钥管理信息发送单元，加密密钥输出管理方法，加密密钥管理程序，许可证信息管理单元，许可证管理信息发送单元，许可信息输出管理方法，许可信息管理程序
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Application No.: US12596792Application Date: 2007-04-20
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Publication No.: US08509444B2Publication Date: 2013-08-13
- Inventor: Yusei Nishimoto , Satoshi Fujitsu , Syunji Sunasaki
- Applicant: Yusei Nishimoto , Satoshi Fujitsu , Syunji Sunasaki
- Applicant Address: JP Saibuya-ku, Tokyo
- Assignee: Nippon Hoso Kyokai
- Current Assignee: Nippon Hoso Kyokai
- Current Assignee Address: JP Saibuya-ku, Tokyo
- Agency: Merchant & Gould P.C.
- International Application: PCT/JP2007/058646 WO 20070420
- International Announcement: WO2008/136077 WO 20081113
- Main IPC: H04L9/00
- IPC: H04L9/00
Abstract:
A low cost scramble key management apparatus which enables to manage a scramble key based on individual contract information and to ensure security in narrow band broadcasting. The scramble key management apparatus 7 includes an ECM decoding unit 75 for decoding an ECM in which a scramble key and individual contract information are encrypted. The individual contract information includes contract information indicating contract statuses of a plurality of content receivers 3, 3, . . . which is arranged based on receiver IDs for identifying each of the content receivers 3. The scramble key management apparatus 7 includes a contract information obtaining unit 76b for obtaining the contract information of the content receiver 3 associated with the receiver ID from the individual contract information and a contract status determining unit 76c for determining the contract status and outputting the scramble key to a content decoder 5 if the contract status is under contract.
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