in car immobilizer sys- authenticate 11000 halted tems and will be the focus of this paper. read 11n n n 00n n n ... active 0 1 2 0 1 2 read 01n 0 1 20n n 0 1 2 active 3.2 Memory write 10n 0 1 21n n 0 1 2 active Hitag2 transponders have a total of 256 bits of non- halt 00n 0 1 21 n 0 1 2.. active volatile
