Content encryption schema for integrating digital rights...

Details Content encryption schema for integrating digital rights... Content encryption schema for integrating digital rights...

2011-07-12

2011-07-12

Popham, Jeffrey D (Department: 2491)

Cryptography

Key management

Having particular key generator

C708S200000, C708S491000

Reexamination Certificate

active

07978848

ABSTRACT:
Systems and methods provide a content encryption schema for integrating digital rights management (DRM) in a multicast/broadcast encryption system. In one implementation, an exemplary integrated key schema provides content encryption keys that can be employed by a multicast or broadcast process, while providing DRM protection of recorded multicast content via a single DRM decryption secret. The integrated key schema provides high security and allows encrypted multicast content to be saved directly to local files. A license server can efficiently manage and generate DRM keys to be delivered to clients because only a single key needs to be delivered per license to a client. The integrated key schema can be applied together with conventional broadcast or multicast encryption techniques.

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