发明名称 |
INFORMATION PROCESSING APPARATUS WITH REPLACEABLE SECURITY ELEMENT |
摘要 |
A field upgradeable security system deciphers signals received from a communication network. An information processor (10) includes a receptacle for receiving a replaceable security element (12). The replaceable security element generates a working key (WK) necessary to the operation of the information processor. The working key is communicated to the information processor encrypted under a secret key (A(M)). The information processor decrypts the encrypted working key for use in deciphering a received communication signal. Additional layers of encryption (A(C), U(M), U(C)) can be added to the communications between the information processor and security element to increase the level of security. <IMAGE> |
申请公布号 |
EP0471373(A3) |
申请公布日期 |
1992.07.29 |
申请号 |
EP19910113757 |
申请日期 |
1991.08.16 |
申请人 |
GENERAL INSTRUMENT CORPORATION |
发明人 |
ESSERMAN, JAMES NEIL;MORONEY, PAUL |
分类号 |
G09C1/00;H04L9/06;H04L9/08;H04L9/10;H04L9/14;H04N7/167 |
主分类号 |
G09C1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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