Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2003-10-03
2008-05-27
Smithers, Matthew B (Department: 2137)
Cryptography
Video cryptography
Copy protection or prevention
C705S057000, C713S168000
Reexamination Certificate
active
07379547
ABSTRACT:
A reproducing method and apparatus for receiving and reproducing data and outputting the data into an external device. After reproducing the data, a descrambler corresponding to a type of the reproduced data is selected from a plurality of descramblers and the external device is authenticated by a selected authenticator which is included in a plurality of authenticators for authenticating the external device and corresponds to the selected descrambler, and the data is outputted.
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“Compliance with Contents Cipher and Bus Authentication”, Nikkei Electronics, pp. 110-119, Aug. 18, 1997, Nikkei BP Publishing.
Arai Takao
Kawamae Osamu
Kimura Hiroyuki
Takeuchi Toshifumi
Yoshiura Hiroshi
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Smithers Matthew B
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