Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2006-04-18
2006-04-18
Decady, Albert (Department: 2133)
Cryptography
Video cryptography
Video electric signal modification
C713S176000
Reexamination Certificate
active
07031471
ABSTRACT:
A trusted rendering system for use in a system for controlling the distribution and use of digital works. A trusted rendering system facilitates the protection of rendered digital works which have been rendered on a system which controls the distribution and use of digital works through the use of dynamically generated watermark information that is embedded in the rendered output. The watermark data typically provides information relating to the owner of the digital work, the rights associated with the rendered copy of the digital work and when and where the digital work was rendered. This information will typically aid in deterring or preventing unauthorized copying of the rendered work to be made. The system for controlling distribution and use of digital works provides for attaching persistent usage rights to a digital work. Digital works are transferred between repositories which are used to request and grant access to digital works. Such repositories are also coupled to credit servers which provide for payment of any fees incurred as a result of accessing a digital work.
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Briggs Nicholas H.
Okamoto Steve A.
Petrie Glen W.
Stefik Mark J.
ContentGuard Holdings Inc.
De'cady Albert
Jack Todd
Kaufman Marc S.
Nixon & Peabody LLP
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