Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1994-06-10
1996-04-09
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 23, H04L 932
Patent
active
055069053
ABSTRACT:
A system for remotely controlling a desired door locking or other function in a vehicle or other protected environment has a transmitter and receiver for communicating a message including a sequence number, the code of a selected function to be performed and an authenticator. An algorithm in the transmitter and in the receiver has a cryptographic key and a seed code. Each algorithm generates the authenticator as a function of both the seed code and the function code; if the authenticators are equal, the message is valid. Upon each transmission the seed code is updated and the sequence number is incremented. The receiver updates its seed code according to the transmitted sequence number to keep the algorithms in synchronism.
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patent: 5103221 (1992-04-01), Memmola
patent: 5191610 (1993-03-01), Hill et al.
patent: 5369706 (1994-11-01), Latka
patent: 5398284 (1995-03-01), Koopman, Jr. et al.
patent: 5420925 (1995-05-01), Michaels
Clifford advertisement, Car Audio & Electronics, May 1994, vol. 7, p. 75.
Viper advertisement, Car Audio & Electronics magazine, May 1994, vol. 7, p. 73.
"Code Grabbing," Car Audio and Electronics magazine, May 1994, vol. 7 pp. 72, 74, 76.
Bianco Mark E.
Khamharn Oddy N.
Markowski Dale W.
Cangialosi Salvatore
Delco Electronics Corp.
Navarre Mark A.
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