System for securing encryption renewal system and for...

Details System for securing encryption renewal system and for... System for securing encryption renewal system and for...

2005-12-20

2005-12-20

Zand, Kambiz (Department: 2132)

Cryptography

Video cryptography

Video electric signal modification

C380S201000, C713S167000, C713S193000, C713S152000

Reexamination Certificate

active

06978022

ABSTRACT:
An encryption renewal system for generating entitlement control messages, the system being secured by physical separation of components. The encryption renewal system has a first computing platform for performing non-secure tasks associated with one or more control messages that transmit one or more keys to a subscriber; and a second computing platform physically separate from the first computing platform containing one or more application specific integrated circuit chip for generating the one or more control messages. In addition, a method by the encryption renewal system is used to register an off-line encryption device in order to begin encrypting clear content. The method includes generating data for registering the off-line encryption device; encrypting the data with one or more cryptographic keys to form encrypted data; forwarding the encrypted data to the off-line encryption device; and retrieving the data from the encrypted data, wherein the off-line encryption device begins to encrypt clear content only after the data is retrieved.

REFERENCES:
patent: 5613012 (1997-03-01), Hoffman et al.
patent: 5627892 (1997-05-01), Kauffman
patent: 6363149 (2002-03-01), Candelore
patent: 6771657 (2004-08-01), Elstermann
patent: WO 98/43426 (1998-10-01), None
patent: WO 00/45306 (2000-08-01), None
patent: WO 00/67483 (2000-11-01), None

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