METHOD FOR AUTHENTICATING AN ENTITY BY A VERIFIER

摘要

The invention relates to a method for authenticating an entity (20) by a verifier (30), the entity having an identifier (ID), the verifier having a pair of private (x) and public (y) keys, and that includes: - sending (m10) to the entity a first random number (r) selected by the verifier; - a step (E11) wherein the entity encrypts a value (v) by means of the public key of the verifier, said value including the first random number and an authentication datum on which the identifier of the entity depends; and - the entity of said encrypted value sending (m11) a reply to authenticate said entity. The invention can be applied to the field of low-cost cryptography, especially the field of radio-identification (RFID).