Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2006-09-19
2006-09-19
Moise, Emmanuel L. (Department: 2137)
Cryptography
Video cryptography
Copy protection or prevention
C380S210000, C380S212000, C713S193000, C713S194000
Reexamination Certificate
active
07110542
ABSTRACT:
A system for protecting audio/video content during storage and playback on systems with open buses receives a multiplexed signal, including a plurality of A/V signals and decryption keys. Following a request for a channel, a single scrambled A/V signal and its associated decryption keys are extracted from the multiplexed signal. The decryption keys are PCX-encrypted while the scrambled signal remains untouched. Both the encrypted decryption keys and the scrambled signal are stored on the system. During storage, the surreptitious piracy of the signals may be avoided.
REFERENCES:
patent: 5742680 (1998-04-01), Wilson
patent: 6061451 (2000-05-01), Muratani et al.
patent: 6064739 (2000-05-01), Davis
patent: 6289455 (2001-09-01), Kocher et al.
patent: 6305018 (2001-10-01), Usui et al.
patent: 6351538 (2002-02-01), Uz
patent: 6363149 (2002-03-01), Candelore
patent: 6577734 (2003-06-01), Etzel et al.
patent: 6714649 (2004-03-01), Masuda et al.
patent: 2001/0008016 (2001-07-01), Kotani et al.
patent: 2002/0188567 (2002-12-01), Candelore
Green Sharmini N.
Moise Emmanuel L.
Nguyen Minh Dieu
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