Method and apparatus to detect and recover a pseudo-random seque

Details Method and apparatus to detect and recover a pseudo-random seque Method and apparatus to detect and recover a pseudo-random seque

1988-03-03

1989-05-02

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

375113, 380 46, H04K 104

Patent

active

048275140

ABSTRACT:
A synchronization detector is disclosed wherein a portion of the received data stream is parallel loaded into a sequence generating means. The sequence generating means provides a local synchronization sequence that is compared to the transmitted synchronization signal, and an error count is tallied. If the number of errors occurring in a predetermined "window" is below a predetermined threshold, a synchronization detect signal is asserted. However, if the errors in a predetermined window exceed the threshold, the sequence generating means is reloaded with another portion of the received data stream and the process is repeated until the synchronization detect signal is asserted.

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"Privacy and Authentication: An Introduction to Cryptography", by Whitfield Diffie and Martin E. Hellman, Proceedings of the IEEE, vol. 67, No. 3., Mar. 1979.

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