Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2004-12-06
2010-02-09
Dada, Beemnet W (Department: 2435)
Cryptography
Video cryptography
Copy protection or prevention
C369S272100, C369S288000
Reexamination Certificate
active
07660415
ABSTRACT:
A method and apparatus for controlling access to a storage medium, such as an optically readable medium. Light sensitive or other materials that are adapted to change state and affect reading of a storage medium are used to control access to data that may be stored on optical medium and/or to control use of the medium.
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pat
Drew Jeffrey M.
Goyette Donald Roland
Selinfreund Richard H.
Vig Rakesh
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