Vehicle security device with electronic use-authorization coding

摘要

The vehicle security device involves an encryption method which operates on the basis of a one-way function and in which it is only absolutely necessary to store secret code information at the key end 1, specifically in the form of different inverse values of a one-way function while it is only necessary for the one-way function values corresponding to these inverse values to be present at the vehicle end 2, the reading out of which inverse values does not permit unauthorized manufacture of a false key because of the virtual non-reversibility of the one-way function.