bmw 16 byte isn

**tomvleeuwen** · 21st May, 2018, 07:43 PM

Originally Posted by droidwayne65

Yup, I did that then went searching in the bin in hopes of finding it but, of course, it wasn't there. Which of course brings me to the obvious question: Have you and @aslamaslam been chatting, LOL?

I got it from the DME eeprom that he uploaded above. I made a simple script that searches through the DME eeprom until it found a string that matches the ISN from CAS with encryption explained above. (e.g. DME[0] ^ CAS[0] == DME[3] ^ CAS[3] == DME[6] ^ CAS[6] etc.) and it found exactly one location.

**droidwayne65** · 21st May, 2018, 10:28 PM

Originally Posted by tomvleeuwen

I got it from the DME eeprom that he uploaded above. I made a simple script that searches through the DME eeprom until it found a string that matches the ISN from CAS with encryption explained above. (e.g. DME[0] ^ CAS[0] == DME[3] ^ CAS[3] == DME[6] ^ CAS[6] etc.) and it found exactly one location.

DME(x) ^ CAS(x) = DME(x+3) ^CAS(x+3).....Clever

! Didn't know the second file was ecu eeprom and never bothered to look at it but I will now. So if all keys are lost, a simple routine can be written to search for the pattern. Thank you sir. I asked about this a few weeks ago, when I became interested in this BMW stuff and received silence but you've pushed me along quite nicely.