Vehicle security device with electronic use authorization coding

Details Vehicle security device with electronic use authorization coding Vehicle security device with electronic use authorization coding

1995-04-03

1997-04-08

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, 380 30, 380 49, 380 50, 34082531, 34082534, H04L 900, H04L 930

Patent

active

056195737

ABSTRACT:
The invention provides a vehicle security device with an electronic use-authorization coding arrangement for identifying authorized access to the vehicle. The vehicle security device utilizes an encryption method which operates on the basis of a one-way function, so that it is only absolutely necessary to store secret code information at the key end, specifically in the form of different inverse images of a one-way function. Only the one-way function values corresponding to these inverse images need be present at the vehicle end, a reading-out of which does not permit unauthorized manufacture of a copied key because of the virtual irreversibility of the one-way function.

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patent: 5365225 (1994-11-01), Bachhuber
patent: 5508692 (1996-04-01), Wolfram
British Search Report dated Jun. 15, 1995.
"Diebstahlschutz Fur das Auto" [Protecting Cars Against Theft] from Temic Telefunken microelektronik GmbH dated Aug. 1993.
"A Method for Obtaining Digital Signatures and Public-Key Cryptosystems," R.L. Rivest et al., Communications of the ACM, vol. 21, No. 2, Feb. 1978, pp. 120-126.
"RIPE Integrity Primitives Part I, Final Report of RACE 1040," RIPE Consortium, Report CS-R9324 Apr. 1993.
Part III Recommended Integrity Primitives, Chapter 3 RIPEMD, pp. 67-109.
Part III Recommended Integrity Primitives, Chapter 7 RSA, pp. 174-190.

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