Electrical computers and digital processing systems: support – Data processing protection using cryptography
Reexamination Certificate
2005-08-30
2005-08-30
Caldwell, Andrew (Department: 2137)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
C380S001000, C380S001000, C380S029000, C380S022000, C369S272100, C369S273000, C369S286000, C713S193000, C713S152000
Reexamination Certificate
active
06938162
ABSTRACT:
A recording type optical disk on which data is recordable includes a data recording and reproducing area for recording data therein and reproducing data therefrom, and a read-only disk identification information area for recording disk identification information for identifying the optical disk therein. In the optical disk, the disk identification information is formed by removing a reflection film that is formed on the optical disk in a strip shape. The disk identification information includes an inherent disk identifier for each optical disk, and the data recording and reproducing area includes an area for recording encrypted data therein. The encrypted data is encrypted by using information including the disk identification information for identifying the optical disk as a key.
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Ishida Takashi
Ishihara Hideshi
Ito Motoshi
Jahana Tadashi
Nagai Takahiro
Caldwell Andrew
Nguyen Minh Dieu
Wenderoth , Lind & Ponack, L.L.P.
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