Dynamic enabling of functionality in electronic document...

Details Dynamic enabling of functionality in electronic document... Dynamic enabling of functionality in electronic document...

2007-10-02

2007-10-02

Revak, Christopher (Department: 2131)

Information security

Prevention of unauthorized use of data including prevention...

Access control

C713S176000, C726S021000, C705S051000

Reexamination Certificate

active

10306635

ABSTRACT:
Methods and apparatus, including computer program products, implementing and using techniques for digital rights management. An electronic document containing one or more content items is provided along with a set of usage rights. The set of usage rights defines one or more features to be enabled when the electronic document is processed in an electronic document reader. A representation of a set of content items of the electronic document that are invariant to operations of the features in the set of usage rights is generated, and a digital signature authorizing the set of usage rights is provided. An electronic document and an electronic document reader are also described.

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