Recording medium, information playback apparatus and method,...

Details Recording medium, information playback apparatus and method,... Recording medium, information playback apparatus and method,...

2004-07-12

2009-06-16

Hoffman, Brandon S (Department: 2436)

Information security

Prevention of unauthorized use of data including prevention...

Copy detection

C369S047120

Reexamination Certificate

active

07549176

ABSTRACT:
In a CD-DA, encoded content in which audio information is encoded using a content key, the content key, and two usage right files are recorded in predetermined regions. The usage right files are a CD-DA usage right file having CD-DA usage rights, and a CD-R usage right file having CD-R usage rights. The usage rights recorded in the CD-DA usage right file regulate the usage on a CD-DA.

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