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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">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<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>
<blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px
#729fcf solid;padding-left:1ex">
<div dir="ltr">
<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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