AUTHENTICATION METHOD, AUTHENTICATION SYSTEM, SERVER TERMINAL, CLIENT TERMINAL AND CORRESPONDING COMPUTER PROGRAMS

摘要

This authentication method between a client (2) and a server (4) sharing a secret (6) comprises the steps of: - generation by the server (4) of a random value (40); server (4) of a first encrypted value (46); - concatenation by the server (4) of the random value (40) and the first encrypted value (46) to form a challenge (10); client (2) the random value (40) and the first encrypted value (46) from the challenge (10); - calculating by the client (2) a second encrypted value (48); client (2) of the first (46) and second (48) encrypted values; and- authentication of the server (4) by the client (2) if the first (46) and second (48) encrypted values are concordant.