Method and apparatus for data authentication in a data communica

Details Method and apparatus for data authentication in a data communica Method and apparatus for data authentication in a data communica

1996-05-14

1997-09-30

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 9, 380 25, 380 29, 380 49, H04L 900, H04L 906

Patent

active

056733186

ABSTRACT:
A method and system for providing data authentication, within a data communication environment, in a manner which is simple, fast, and provably secure. A data message to be sent is partitioned into data blocks. Each data block is combined with a block index to create a word. A pseudo-random function is applied to each word to create a plurality of enciphered data strings. An identifying header, comprising the identity of the sender and a counter value, is also enciphered using a pseudo-random function. These enciphered data strings and header are logically combined to create a tag. As the enciphering of a particular word occurs independent of the other words, each block can be enciphered independently of the others. The method and system can thus be performed and structured in either a parallel or pipelined fashion. A receiving component or system generates a second tag which can then be compared with the transmitted tag to determine message authentication.

REFERENCES:
patent: 5369705 (1994-11-01), Bird et al.

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