Authentication procedure of a first and second entities before a third entity

摘要

Authentication procedure of a first entity (10) and a second entity (20) by a third entity (30), said first and third entities sharing a first secret key (K1), said second and third entities sharing a second secret key (K2), the procedure comprising steps: - sending (E0) by the third entity to the first entity of a challenge (Shawl), - calculation (E2) by the first entity using the first secret key of an authentication value (Res1) depending on the challenge received, - sending (E3) by the first entity to the second entity of the calculated authentication value, - calculation (E5) by the second entity by means of an encryption algorithm parameterized by the second secret key of an authentication response (Res2), based on a known record of the third entity and the second entity and the authentication value received from the first entity, - of sending (E6) by the second entity to the third entity of the authentication response, - calculation (E8) by the third entity through the first and second secret keys of an expected authentication response (Res), depending on the record and challenge, - comparison (E9 ) of the authentication response received with the expected authentication response calculated