Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2006-04-18
2006-04-18
Zand, Kambiz (Department: 2132)
Cryptography
Video cryptography
Video electric signal modification
C380S200000, C713S167000, C713S169000, C713S193000, C726S002000
Reexamination Certificate
active
07031472
ABSTRACT:
A playback instructing unit in a disk playback controller has a function to instruct a CPU to play back an optical disk at different access positions in an absolute authentication process and an arbitrary authentication process. An absolute decision unit has a function to be activated by an absolute authentication instruction from the playback instructing unit and authenticate the decided result from an authentication decision means according to a first rule (which declares normal authentication based on a normal decision). An arbitrary decision unit has a function to be activated by an arbitrary authentication instruction from the playback instructing unit and authenticate the decided result from the authentication decision unit according to a second rule (which declares normal authentication based on an abnormal decision). Even if a special device which can normally authenticate an optical disk that should not be authenticated normally is connected to a disk access mechanism, the optical disk that should not be authenticated normally or the special device can reliably be detected to forcibly interrupt any process being carried out, so that the optical disk can effectively be prevented from being illegally copied.
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Official Notification on the Prolongation of the Term for Filing Official Response to the Advisory Office Action for 1 month &Resolution on Granting the Patent of the Invention of Sep. 7, 2004 issued on the corresponding Russian Patent Application No. 99120665/28(021526), and the English translations of the same.
Frommer William S.
Frommer & Lawrence & Haug LLP
Lee Samuel S.
Sony Computer Entertainment Inc.
Zand Kambiz
LandOfFree
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