Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2007-11-20
2007-11-20
Barrón, Jr., Gilberto (Department: 2132)
Cryptography
Video cryptography
Copy protection or prevention
C726S026000, C713S189000, C713S193000, C705S057000
Reexamination Certificate
active
10115405
ABSTRACT:
A recording/reproducing apparatus includes: a first storage section for storing data structure information which includes encrypted data; a special information holding section for holding special information associated with the data structure information; and a controller for controlling the first storage section and the special information holding section. The data structure information is associated with the special information such that the special information is updated in response to an update of the data structure information, or such that the data structure information is updated in response to an update of the special information. The controller controls movement of the encrypted data from the first storage section to a second storage section, and the controller updates the special information such that a mismatch occurs between the special information obtained before the movement of the encrypted data and the special information obtained after the movement of the encrypted data.
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European Search Report regarding Application No. 02007378.9-2202 dated Aug. 16, 2002.
Ide Hirofumi
Ishihara Hideshi
Nagai Takahiro
Sugimoto Hiroshi
Barrón Jr. Gilberto
Matsushita Electric - Industrial Co., Ltd.
Nobahar Abdulhakim
Renner , Otto, Boisselle & Sklar, LLP
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