Decryption key reuse in encrypted digital data stream distribution systems
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United States of America Patent
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N/A
Issued Date -
Sep 20, 2007
app pub date -
Mar 15, 2006
filing date -
Mar 15, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
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.
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