Patent ID: 9219612
Filing Date: 2015-12-22
Classification: H04L,H04W

Abstract:
1. A method of mutually authenticating a reader and a radio tag, the method comprising: a step of the tag sending data to the reader, the data enabling an index to be determined for identifying a pre-calculated authentication coupon of the reader, the index being selected by the tag; a step of the reader obtaining the pre-calculated authentication coupon of the reader from the determined index and of the reader sending the pre-calculated authentication coupon of the reader to the tag; a step of the tag obtaining an authentication value from the selected index and of the tag verifying that the coupon received from the reader corresponds to the authentication value that is obtained, the authentication value of the reader being obtained by a first pseudo-random function installed in the tag, using a first secret regeneration key as its parameter, and applied to the selected index; if the verification is positive, then a step of finalizing the authentication of the tag by the reader, wherein the authentication of the tag is based on a public key cryptography scheme; and if the verification is negative, interrupting the mutual authentication method.