Patent ID: 8451099
Filing Date: 2013-05-28
Classification: G07C,H04L

Abstract:
1. A method for duplicating electronic vehicle keys with mutual authentication, to be used in vehicles provided with an immobilizer control unit, comprising: applying temporarily, to an original electronic key to be duplicated, an inductive reader for signals exchanged between a transponder of said original electronic key and the immobilizer control unit; activating a vehicle instrument panel at least twice with said original electronic key connected to said inductive reader, to cause said inductive reader to acquire RDN connecting the inductive reader to a transponder reader/writer to transfer all acquired data thereto; determining a non-readable SK code of the immobilizer control unit via said reader/writer by using a function f reading from the original key, via said reader/writer, using said non-readable SK code, any other data memorized therein; reading an ID value selected among said ID, RND, and SK values from the original key, via said reader/writer, before, during or after any one of the preceding steps; and memorizing in a new key all data read from the original key; further comprising, in a case of key with mechanical notching, the step of mechanically notching said new key at any stage of acquiring the data resident in the original key and memorizing said data in said new key.