PROCEDE D'AUTHENTIFICATION D'UN TAG

摘要

The method involves sending an authentication message by a radio frequency identification (RFID) tag (3) to an authentication system (2), where the message includes current index value generated based on current value of a key and a number generated by application of a function for calculation of current value of the key. The value of the key associated with the current index value is compared with result of the application of the function, where the tag upgrades the value of the key in a memory when the current index value equals the result of the application of the function. An independent claim is also included for an authentication system.