Separation of copy protection rules

Details Separation of copy protection rules Separation of copy protection rules

2004-09-02

2009-06-23

Cervetti, David Garcia (Department: 2436)

Cryptography

Video cryptography

Copy protection or prevention

C726S026000, C726S027000, C726S030000, C725S148000, C380S201000, C380S212000

Reexamination Certificate

active

07551738

ABSTRACT:
A copyright protection method and apparatus employ a first protection scheme within a single authorized domain, in which all interfaces are protected with digital rights management system, and employ a second protection scheme for use in inter-domain file transfers. The method and apparatus employ a third protection scheme for external outputs not protected by a digital rights management system.

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