Information recording/reproducing system

Details Information recording/reproducing system Information recording/reproducing system

2006-02-14

2006-02-14

Smithers, Matthew (Department: 2137)

Cryptography

Video cryptography

Copy protection or prevention

C705S056000, C705S057000, C705S058000, C380S203000, C360S015000, C360S060000, C386S349000, C369S030010, C369S030040, C369S047120, C369S047130

Reexamination Certificate

active

06999587

ABSTRACT:
An information recording medium1is provided with: a user data recording part3which records user data; a random-patter-information recording part4which records random pattern information from a random physical phenomenon; and an authentication data recording part5which records, as authentication data, medium identification information created on the basis of the random pattern information detected from the random-pattern-information recording part4and a digital signature for each manufacturer with respect to the medium identification information.

REFERENCES:
patent: 4577289 (1986-03-01), Comerford et al.
patent: 4584641 (1986-04-01), Guglielmino
patent: 4734796 (1988-03-01), Grynberg et al.
patent: 4849836 (1989-07-01), Kachikian
patent: 5513169 (1996-04-01), Fite et al.
patent: 5724327 (1998-03-01), Timmermans et al.
patent: 7-182766 (1995-07-01), None
patent: 10-21144 (1998-01-01), None
patent: 11-7412 (1999-01-01), None

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