ONE-TIME AUTHENTICATION SYSTEM

摘要

An authentication system includes a plurality of electronic tags (120, 122, 124) that are each associated with a respective unique identity ID. The tags include a memory (220) with a first memory location (222) for storing a pre-computed challenge and a second memory location (224) for storing a pre-computed response that is associated with the challenge. The first memory location (222) is non-readable from outside the tag. An access circuit (210) only provides the response after having received a challenge that matches the challenge stored in the first memory location. A reader station (110) obtains the identity associated with a tag. It then determines a corresponding challenge and sends the challenge to the tag. It receives a response from the tag and verifies the authenticity of the tag by comparing the received response to a response that corresponds to the challenge.