Methods, systems and computer program products for secure...

Details Methods, systems and computer program products for secure... Methods, systems and computer program products for secure...

2006-06-27

2006-06-27

Jung, David (Department: 2134)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

C713S189000, C713S001000, C713S002000

Reexamination Certificate

active

07069452

ABSTRACT:
Methods, systems and computer program products which provide secure updates of firmware (i.e. data stored in a programmable memory device of a processing system) are disclosed. Updates of a programmable memory of a device may be controlled by providing an update window of finite duration during which the programmable memory may be updated. Access to the programmable memory may be based on the state of an access latch. The access latch may be set to allow access after a hardware reset of the device. An update control program may be executed to control access to the programmable memory and the latch reset to prevent access upon completion of the update control program. Verification of the update may be provided through encryption techniques and rules incorporated in certificates for application of updates to provide for selectively updating devices. Also disclosed are methods of securely providing differing functionality to generic devices.

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“Introduction to Digtial Signal Processors”, Jun. 15, 1999, [Retrieved from the Internet Apr. 29, 2004], “http://www.ece.utexas.edu/˜bevans/hp-dsp-seminar/01—introduction/”.
ANSI Standard X9.31. Digital Signatures Using Reversible Public Key Cryptography for the Financial Services Industry (rDSA), 1998.
Schneier, Bruce,Applied Cryptography, Dec. 1995, pp. 435-441 and 466-474.

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