Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2005-07-07
2010-10-05
Fischer, Andrew J. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C705S067000
Reexamination Certificate
active
07809644
ABSTRACT:
A digital work and data structure for use within a system for enforcing usage rights associated with digital content, including a description tree file including descriptor blocks organized in a hierarchical manner. The descriptor blocks include usage rights associated with the digital content, and specifying a manner of use of the digital content, a content identifier including a unique identifier of the digital content, and a usage rights portion including the usage rights. The digital content includes plural content portions, and the usage rights portion includes a rights code field including a code indicative of the manner of use of the digital content and a status information field including information relating to a state of the manner of use.
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Pirolli Peter L. T.
Stefik Mark J.
ContentGuard Holdings Inc.
Fischer Andrew J.
Hertzler Stephen M.
Kaufman Marc S.
Nixon & Peabody LLP
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