发明名称 |
THRESHOLD CRYPTOGRAPHY SCHEME FOR CONDITIONAL ACCESS SYSTEMS |
摘要 |
A method and apparatus for managing access to a signal representative of an event of a service provider, including receiving said signal in a smart card, said signal being scrambled using a scrambling key, receiving, in said smart card, data representative of a first share; constructing said scrambling key using said first share and at least one additional share, said additional share being stored in said smart card; and descrambling said signal using said constructed scrambling key to provide a descrambled signal, wherein the step of constructing said scrambling key comprises calculating the Y-intercept of the line formed on said Euclidean plane by said first, and said at least one additional share. |
申请公布号 |
WO0245337(A2) |
申请公布日期 |
2002.06.06 |
申请号 |
WO2001US29790 |
申请日期 |
2001.09.24 |
申请人 |
THOMSON LICENSING S.A.;ESKICIOGLU, AHMET, MURSIT |
发明人 |
ESKICIOGLU, AHMET, MURSIT |
分类号 |
G06F21/24;H04L9/08;H04L9/32;H04N7/16;H04N7/167 |
主分类号 |
G06F21/24 |
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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