Method and apparatus for hierarchical assignment of rights...

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique

Reexamination Certificate

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C713S182000, C713S193000, C713S152000, C713S152000

Reexamination Certificate

active

06895503

ABSTRACT:
Digital rights management allows one or more of usage rights and delegation rights to be associated with a document. Through the use of the usage rights and the delegation rights, a hierarchy of rights associated with a document is created that provides a tree-type structure of rights extending from the content owner down through one or more users.

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