Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2003-08-11
2008-08-19
Smithers, Matthew (Department: 2137)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C380S203000, C369S084000
Reexamination Certificate
active
07415619
ABSTRACT:
A recording disc has a lead-in area and a data area. A scrambled version of a SID code word is read out from the lead-in area of the disc. The SID code word represents a producer of the disc. The readout scrambled version is de-scrambled to recover the SID code word. The recovered SID code word is collated with reference SID code words to decide whether or not the disc is legitimate. Main information is read out from the data area of the disc when it is decided that the disc is legitimate. Readout of the main information from the data area of the disc is inhibited when it is decided that the disc is not legitimate.
REFERENCES:
patent: 5003410 (1991-03-01), Endoh et al.
patent: 5057947 (1991-10-01), Shimada
patent: 5519681 (1996-05-01), Maeda et al.
patent: 5538773 (1996-07-01), Kondo
patent: 5661715 (1997-08-01), Blaukovitsch
patent: 5671205 (1997-09-01), Ledieu
patent: 5734787 (1998-03-01), Yonemitsu et al.
patent: 5761301 (1998-06-01), Oshima et al.
patent: 5807640 (1998-09-01), Ueno et al.
patent: 5872755 (1999-02-01), Inazawa et al.
patent: 5883959 (1999-03-01), Kori
patent: 5889868 (1999-03-01), Moskowitz et al.
patent: 5901127 (1999-05-01), Sako et al.
patent: 5940358 (1999-08-01), Kato
patent: 6005839 (1999-12-01), Sako et al.
patent: 6052465 (2000-04-01), Gotoh et al.
patent: 6618335 (2003-09-01), Tanaka et al.
patent: 328141 (1989-08-01), None
patent: 407094 (1991-01-01), None
patent: 580367 (1994-12-01), None
patent: 02036475 (1990-02-01), None
patent: 05-159462 (1993-06-01), None
patent: 06-150568 (1994-05-01), None
patent: 07-021697 (1995-01-01), None
patent: 08-031080 (1996-02-01), None
patent: 08-212681 (1996-08-01), None
Oowaki Isao
Tanaka Yoshiaki
Connolly Bove & Lodge & Hutz LLP
Gergiso Techane J
Smithers Matthew
Victor Company of Japan Ltd.
Victor Entertainment, Inc.
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