Cryptography – Key management – Having particular key generator
Patent
1998-01-08
2000-08-01
Swann, Tod R.
Cryptography
Key management
Having particular key generator
705 57, G06F 1214
Patent
active
060978147
ABSTRACT:
Plural program information and a BCA (Burst Cutting Area) number of the optical disc (100) is previously recorded in the optical disc (100). A drive ID is stored in the nonvolatile memory (104a) of the reproduction apparatus (104). A user of the reproduction appparatus (104) notifies the BCA number, the drive ID, and a number of preferred program information to the software house (software supplier(110) on the condition that the user pays for the reproduction of the preferred program information recorded in the optical disc (100). The software house (110) notifies a cipher key to the reproduction apparatus (104) or the user. A title key is calculated in the reproduction apparatus (104) in accordance with the BCA number, the drive ID, and the cipher key. The preferred information recorded in the optical disc (100) is permitted to be reproduced by using the title key.
REFERENCES:
patent: 5400319 (1995-03-01), Fite et al.
patent: 5646993 (1997-07-01), Aizawa
patent: 5703952 (1997-12-01), Taylor
patent: 5881038 (1999-03-01), Oshima et al.
patent: 5886979 (1999-03-01), Moribe et al.
Lieberstein Eugene
Meller Michael N.
Smithers Matthew
Swann Tod R.
Victor Company of Japan Ltd.
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