发明名称 |
RECEPTION APPARATUS FOR AUTHENTICATED ACCESS TO CODED BROADCAST SIGNALS |
摘要 |
<p>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.</p> |
申请公布号 |
EP0880841(B1) |
申请公布日期 |
2002.09.04 |
申请号 |
EP19970903481 |
申请日期 |
1997.02.14 |
申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY |
发明人 |
SAGER, JOHN CHRISTOPHER |
分类号 |
H04L9/32;H04N7/16;(IPC1-7):H04L9/32 |
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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