发明名称 |
Reception apparatus for authenticated access to coded broadcast signals |
摘要 |
Decoding of a broadcast signal is enabled only if it carries an identifier verified by its presence (or absence) in a stored list. The list is loaded from a removable module. Preferably the loading of the list is conditional upon the success of a cryptographically authenticated exchange of signals between the module and the main part of the receiver.
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申请公布号 |
US6473742(B1) |
申请公布日期 |
2002.10.29 |
申请号 |
US19980043643 |
申请日期 |
1998.03.25 |
申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY |
发明人 |
SAGER JOHN C |
分类号 |
H04L9/32;H04N7/16;(IPC1-7):H04N7/16;H04N7/00 |
主分类号 |
H04L9/32 |
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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