A simple reference implementation for the AUT64 encryption (only) function.

Run aut64_lib.py to see some exanmple AUT64 ciphertexts.

For a detailed explanation of the cipher, its implementation in a vehicle immobiliser system and its weaknesses and vulnerabilities see:

• https://tches.iacr.org/index.php/TCHES/article/view/874
• https://www.youtube.com/watch?v=WP4LpId2Hv0
• https://hkscy.org/blog/?p=243