Method and apparatus for providing security in a data...

Details Method and apparatus for providing security in a data... Method and apparatus for providing security in a data...

2004-06-10

2009-06-02

Parthasarathy, Pramila (Department: 2436)

Cryptography

Key management

Having particular key generator

C713S189000, C713S153000

Reexamination Certificate

active

07542567

ABSTRACT:
One embodiment relates to a data processing system having a cryptographic unit. The cryptographic unit includes cryptographic circuitry which performs a first cryptographic function to provide security for a portion of the cryptographic unit, and which performs a second cryptographic function to provide security for a portion of the data processing system external to the cryptographic unit. The cryptographic unit may therefore operate in a normal operating mode and in a secure operating mode. During a first secure operating mode a first key is used to decrypt first security configuration information which includes a second key. During a second secure operating mode, the second key is used to decrypt second security configuration information. The cryptographic unit may include a secure internal memory such that during the secure operating modes, the cryptographic unit may only process descriptors provided from this secure internal memory.

REFERENCES:
patent: 6170057 (2001-01-01), Inoue et al.
patent: 7020282 (2006-03-01), Chang
patent: 7327846 (2008-02-01), Chang
patent: 2003/0110388 (2003-06-01), Pavlin et al.
patent: 2005/0050362 (2005-03-01), Peles

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