发明名称 |
DECRYPTION KEY REUSE IN ANCRYPTED DIGITAL DATA STREAM DISTRIBUTION SYSTEMS |
摘要 |
A data processing apparatus for a first encrypted digital datum in a digital data stream distributed in a distributed system. The apparatus includes a key extractor for obtaining a symmetric encryption key used to encrypt the first encrypted digital datum; a decryption system for creating a plaintext digital datum from the first encrypted digital datum using the symmetric encryption key; a processing system for operating on the plaintext digital datum to produce a modified plaintext digital datum; an encryption system for creating second encrypted digital datum from the modified plaintext digital datum using the symmetric encryption key; and a transmitter for introducing the second encrypted digital datum into digital data stream. |
申请公布号 |
CA2647470(A1) |
申请公布日期 |
2007.09.20 |
申请号 |
CA20072647470 |
申请日期 |
2007.03.15 |
申请人 |
TERAYON COMMUNICATIONS SYSTEMS, INC. |
发明人 |
QUINARD, FABRICE MICHEL RAYMOND |
分类号 |
H04L9/00 |
主分类号 |
H04L9/00 |
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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