Cryptography – Key management – Having particular key generator
Reexamination Certificate
2007-07-03
2010-12-28
Song, Hosuk (Department: 2435)
Cryptography
Key management
Having particular key generator
C713S189000
Reexamination Certificate
active
07860248
ABSTRACT:
The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with certainty. Data enciphered by a 1394 interface of a DVD player is transmitted to a personal computer and a magneto-optical disk apparatus through a 1394 bus. In the magneto-optical disk apparatus with which a change to a function is open to a user, the received data is deciphered by a 1394 interface. In contrast, in the personal computer with which a change to a function is open to a user, the enciphered data is deciphered using a time variable key by a 1394 interface, and a result of the decipherment is further deciphered using a session key by an application section.
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Asano Tomoyuki
Ishiguro Ryuji
Osakabe Yoshio
Osawa Yoshitomo
Sato Makoto
Frommer William S.
Frommer & Lawrence & Haug LLP
Song Hosuk
Sony Corporation
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