Cryptography – Key management
Reexamination Certificate
2011-05-17
2011-05-17
Jung, David Y (Department: 2431)
Cryptography
Key management
C380S278000, C380S286000, C380S044000
Reexamination Certificate
active
07945052
ABSTRACT:
Secondary content in encrypted for distribution to client terminals by selecting at least a portion of raw encrypted audio-video data (REAVD) that is provided on a media article as an encryption key, encrypting secondary content using the encryption key, and storing encrypted secondary content at a remotely located host. The media article can then be used for providing access to the encrypted secondary content to client terminals by receiving encrypted secondary content at a client terminal, extracting a decryption key from a media article encoded with REAVD, the decryption key being determined by at least a portion of the REAVD, using the decryption key to decrypt the secondary content, and outputting the decrypted secondary content from the client terminal.
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Connolly Bove & Lodge & Hutz LLP
Jaech Jonathan A.
Jung David Y
LandOfFree
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