Securely encrypted remote keyless entry system

Details Securely encrypted remote keyless entry system Securely encrypted remote keyless entry system

1997-06-18

1999-11-02

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 9, 380 21, 380 25, 380 43, 380 46, 380 49, 34082531, 34082534, H04L 932, H04L 900

Patent

active

059784830

ABSTRACT:
A remote keyless entry system particularly suited for preventing access to unauthorized individuals by securely encrypting messages transmitted from a remote transmitter to a receiver. A unique encryption algorithm is used to generate a multibit message having a pseudorandom number, key code and transmitter identification code (ID) encrypted within. The encryption algorithm generates said multibit message as a function of a pseudorandom number generator, a fixed key code table, ID and a switch, e.g., command, code. A receiver can decrypt the message to obtain the switch code and will respond thereto only if the message originated from an authorized transmitter, i.e., if the received pseudorandom number, key code and ID match those stored within the receiver.

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