Digital rights management (DRM) encryption and...

Details Digital rights management (DRM) encryption and... Digital rights management (DRM) encryption and...

2007-09-18

2007-09-18

Zand, Kambiz (Department: 2134)

Information security

Prevention of unauthorized use of data including prevention...

Access control

C380S259000, C713S155000, C713S165000, C713S171000

Reexamination Certificate

active

10123479

ABSTRACT:
A device has a symmetric device key (DK) and a copy of (DK) encrypted according to a public key (PU) of an entity (PU(DK)). The device receives an object from a host computer, at least a portion of which is encrypted according to (DK). The device sends (PU(DK)) to the host computer, and the host computer sends (PU(DK)) to the entity. The entity applies a corresponding private key (PR) to (PU(DK)) to obtain (DK) and sends (DK) to the host computer. The host computer may then encrypt the object according to (DK) and download same to the device, and the device may decrypt the encrypted object based on (DK).

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Weber, R., “Digital Rights Management Technology,” Oct. 1995, 35 pages.

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