Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2005-10-03
2010-02-16
Fischer, Andrew J. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C705S052000
Reexamination Certificate
active
07664708
ABSTRACT:
A method, system and software for controlling the number of times that a usage right associated with a digital work can be exercised, including creating a digital work; determining a usage right for the digital work, the usage right specifying a digital ticket, the digital ticket indicating a number of times the usage right may be exercised; requesting access to the digital work including an identification of the usage right; determining the validity of the usage right based on a number of times the digital ticket has been used; granting or denying access to the digital work based on the result of the determining step; and updating the digital ticket if access to the digital work is granted.
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Pirolli Peter L. T.
Stefik Mark J.
ContentGuard Holdings Inc.
Fischer Andrew J.
Hertzler Stephen
Kaufman Marc S.
McIntyre C. Aaron
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