Cryptography – Key management – Key distribution
Reexamination Certificate
2008-03-04
2008-03-04
Zia, Syed A. (Department: 2131)
Cryptography
Key management
Key distribution
C380S277000, C713S168000, C713S171000, C726S026000
Reexamination Certificate
active
09568912
ABSTRACT:
In an information processing apparatus, a key management unit forms a judgment as to whether an authentication key owned by an application program is valid or invalid. A content protection unit is controlled based on this determination so that contents are exchanged between the information processing apparatus and the application program. An encryption/decryption unit encrypts a decrypted content by using an encryption key received from a key management unit and outputs the encrypted content to an encrypted-information addition unit. The encrypted-information addition unit adds encrypted information to the encrypted content received from the encryption/decryption unit and outputs the encrypted content with the encrypted information added thereto to the application program. As a result, it is possible to prevent content from being utilized illegally.
REFERENCES:
patent: 5319705 (1994-06-01), Halter et al.
patent: 5708711 (1998-01-01), Rosauer et al.
patent: 5937066 (1999-08-01), Gennaro et al.
patent: 6058476 (2000-05-01), Matsuzaki et al.
patent: 6073234 (2000-06-01), Kigo et al.
patent: 6076077 (2000-06-01), Saito
patent: 6097818 (2000-08-01), Saito
patent: 6141753 (2000-10-01), Zhao et al.
patent: 6263313 (2001-07-01), Milsted et al.
patent: 6289455 (2001-09-01), Kocher et al.
patent: 6550011 (2003-04-01), Sims, III
patent: 6571337 (2003-05-01), Xiao
patent: 7219227 (2007-05-01), Hori et al.
patent: 0 800 312 (1997-10-01), None
patent: 0 858 183 (1998-08-01), None
patent: 0 874 300 (1998-10-01), None
“5c Digital Transmission Content Protection White Paper”, Jul. 14, 1998, pp. 1-13, XP002907865.
Fujii Asako
Hamada Ichiro
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sony Corporation
Zia Syed A.
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