Electronic object e.g. radio frequency identifier type electronic label, authenticating method, involves encrypting number using one-way function, and determining cryptogram from secret identifier, of encrypted number and variable

摘要

The method involves encrypting and storing a number (N1d) using a one-way function (f), and determining a cryptogram (X), from a secret identifier (IS) of the object, of the encrypted number and a random variable (R) which is generated by an authentication entity (SA) e.g. authentication server The cryptogram is transmitted to the entity and is decrypted by applying a decryption function to the cryptogram and to the variable in order to produce a decrypted identifier. An identifier equal to the decrypted identifier is searched in a database. Independent claims are also included for the following: (1) a system for authenticating an electronic object by an authentication entity (2) a computer program for authenticating an electronic object by an authentication entity.