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    Jaime,<br>
    <br>
    don't rule out a simple arithmetic operation too soon.<br>
    <br>
    The VW eUp for example simply applies key = seed + passcode (each 32
    bits). The "security" is achieved here by obscurity, i.e. people
    simply need to know the function specific passcode.<br>
    <br>
    As you've got access to a device that implements the access scheme,
    a decoding vector could be reading the firmware.<br>
    <br>
    Regards,<br>
    Michael<br>
    <br>
    <br>
    <div class="moz-cite-prefix">Am 12.10.22 um 07:35 schrieb Chris van
      der Meijden:<br>
    </div>
    <blockquote type="cite"
      cite="mid:c8fa9f25f7e32fcb12cae23ce8bf9977ddfeb3d3.camel@arachnon.de">
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      <div>Hi Jaime</div>
      <div><br>
      </div>
      <div>Cool project on an interesting car.</div>
      <div><br>
      </div>
      <div>I can't help you directly on decyphring the seed-keys, but I
        found information on the Tesla key algorithms recently:</div>
      <div><br>
      </div>
      <div><a
href="https://gist.github.com/darconeous/2cd2de11148e3a75685940158bddf933"
          moz-do-not-send="true" class="moz-txt-link-freetext">https://gist.github.com/darconeous/2cd2de11148e3a75685940158bddf933</a></div>
      <div><br>
      </div>
      <div>Perhaps you can find some hints there. Only a guess, but
        perhaps worth reading.</div>
      <div><br>
      </div>
      <div>Regards</div>
      <div><br>
      </div>
      <div>Chris</div>
      <div><br>
      </div>
      <div><br>
      </div>
      <div>Am Dienstag, dem 11.10.2022 um 17:20 -0300 schrieb Jaime
        Middleton:</div>
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        #729fcf solid;padding-left:1ex">
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          <div>Hi all, </div>
          <div>I am currently working on the implementation for the
            Maxus Euniq6. I have been able to decipher most of the
            metrics I wanted, but now I need to open and close doors. </div>
          <div>I was able to get access to a scanner for the car and
            sniff the can while the scanner opened and closed the
            doors. </div>
          <div>I mostly deciphered the interaction between the car and
            the scanner but there seems to be a seed-key algorithm in
            order to authenticate the scanner with the car. (I have
            ruled out a simple xor of bitshift).</div>
          <div>Any ideas on how to decipher this?</div>
          <div>I have a list of seed-keys and the chatter before in case
            someone wants to take a look.</div>
          <div>Any help is greatly appreciated.</div>
          <div><br>
          </div>
          <div>Thanks, </div>
          <div>
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                        <p
style="color:#0057b7;font-family:'Poppins',sans-serif;font-weight:500;font-size:12px;margin:0;padding-bottom:5.5px;font-weight:bold">Jaime
                          Middleton</p>
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style="font-family:'Poppins',sans-serif;font-weight:400;font-family:'Poppins',sans-serif;font-weight:500;margin:0;font-size:8px;color:#333333">Software
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                              alt="Tucar cell phone" style="height:12px"
                              moz-do-not-send="true"></span> +56 9
                          42526635 </p>
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    <pre class="moz-signature" cols="72">-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
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