Automatic resynchronization of transmitter in the event of corru

Details Automatic resynchronization of transmitter in the event of corru Automatic resynchronization of transmitter in the event of corru

1995-09-05

1997-07-08

Chin, Wellington

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 23, 380 46, 380 48, 380 50, 371 671, 371 691, 375358, 375359, H04L 900

Patent

active

056469969

ABSTRACT:
Loss of synchronization between transmitter and receiver of a remote entry system is detected during the communication sequence between transmitter and receiver, by generating a checksum of the authentication code at the initiation of the communication sequence and comparing it with a checksum previously stored. If the checksums do not match an automatic resynchronization sequence is begun in which random numbers are generated by the transmitter and broadcast to the receiver for subsequent use as rolling code or linear feedback shift register variables.

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