Method for duplicating electronic vehicle keys with mutual authentication
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United States of America Patent
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May 28, 2013
Grant Date -
Jun 21, 2012
app pub date -
Sep 27, 2010
filing date -
Oct 2, 2009
priority date (Note) -
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Abstract
A method for duplicating electronic keys with mutual authentication includes: applying temporarily, to an original electronic key, an inductive reader for signals exchanged between the key transponder and the vehicle immobilizer control unit; activating the vehicle instrument panel at least twice with the original key to cause the inductive reader to acquire the RDN1, RDN2, SIG1 and SIG2 codes transmitted by the control unit; connecting the inductive reader to a transponder reader/writer to transfer all acquired data; determining the non-readable SK code of the immobilizer control unit via the reader/writer by using a function inverse to that creating the SIG code from the ID, RND, SK codes and the acquired data; reading from the original key, via the reader/writer, using the non-readable SK code, any other data memorized therein, reading the ID code from the original key, via the reader/writer; and memorizing in a new key all the read data.
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