Vehicle security device with electronic use authorization coding

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

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380 23, 380 25, 380 49, 34082531, H04L 916

Patent

active

057745501

ABSTRACT:
The invention provides a vehicle security device with an electronic use-authorization coding arrangement for preventing unauthorized access to the vehicle. The vehicle security device utilizes digital signature algorithm for encrypting and transmitting authorization and synchronization information, so that the storage of secret information is essential only at the key unit in order to transmit authorization and/or synchronizing information from the key unit to the vehicle unit in a way which is very effectively protected against falsification. Thus, reading out vehicle unit information does not permit unauthorized manufacture of a copied key.

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