2 1 METHOD FOR THE AUTHENTICATION OF A FIRST ELECTRONIC ENTITY BY A SECOND ELECTRONIC ENTITY AND ELECTRONIC ENTITY IMPLEMENTING SUCH A METHOD

摘要

The invention relates to a method of authentication of a first electronic entity (C) by a second electronic entity (H). A first electronic entity (C) comprises: receiving a challenge (HCH) from a second electronic entity (H); Generating a current value of the counter SQC and a number (CCH) according to the first secret key (K-ENC); Generating a ciphertext (CAC) according to a challenge (HCH) and a second secret key (S-MAC); And a ciphertext (CAC) to the second electronic entity (H) without sending the number (CCH).