Data processing: financial – business practice – management – or co – Business processing using cryptography
Reexamination Certificate
2005-02-22
2005-02-22
Hayes, John W. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
C705S051000, C705S054000, C705S057000
Reexamination Certificate
active
06859789
ABSTRACT:
An information recording medium and information processing device capable of preventing recording and reproduction of information by unauthorized users not possessing a genuine licensed disk device. A public key for a particular medium and a secret key are recorded on a medium and, a secret key for deciphering the encoding is recorded on a normally inaccessible region of the medium to prevent a user from downloading and altering the secret key with external commands. Information encoded by the public key of a particular device can only be decoded by the secret key of this device or a decipher key decodable only by the secret key, and recording or reproduction of decoded data is only possible on the genuine licensed device, and illegal recording or reproduction of data can therefore be prevented.
REFERENCES:
patent: 4531167 (1985-07-01), Berger
patent: 5383065 (1995-01-01), Hayashi
patent: 5499298 (1996-03-01), Narasimhalu et al.
patent: 5867337 (1999-02-01), Shimomura
patent: 6098056 (2000-08-01), Rusnak et al.
patent: 6209092 (2001-03-01), Linnartz
patent: 6330624 (2001-12-01), Cromer et al.
patent: 6487032 (2002-11-01), Cloke et al.
patent: 10133955 (1998-05-01), None
“Closure Near on PC-Related DVD Copy Protection Issues”, Consumer Electronics, v37, n21, May 26, 1997.
Fukuyama Munekatsu
Hayashi Nobuhiro
Frommer William S.
Frommer & Lawrence & Haug LLP
Hayes John W.
Hewitt II Calvin L.
Mahr Hans R.
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