Circuit and method for providing secure communications...

Details Circuit and method for providing secure communications... Circuit and method for providing secure communications...

2004-01-27

2009-08-04

Smithers, Matthew B (Department: 2437)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S193000, C380S030000, C380S044000

Reexamination Certificate

active

07571320

ABSTRACT:
An electronic system and method for providing secure communications between devices. The secure communications are maintained through use of an integrity check value (ICV) that accompanies a message. The ICV is used to determine whether the contents of a message have been modified during transmission. An efficient technique for producing the ICV involves bitwise arithmetic operations and “exclusive OR” operations between data associated with the message (in its non-encrypted format) and coefficients of a matrix. The “coefficients” are selected bits from a pseudo-random data stream created by a cipher engine from keying material used in communications between the devices.

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Krawczyk, H. “LFSR-Based Hashing and Authentication,” Proceedings of the Annual International Cryptology Conference (CRYPTO), DE, Berlin, Springer, vol. Conf. 14, Aug. 21, 1994, pp. 129-139, XP000467659, ISBN: 3-540-58333-5.

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