METHOD FOR CONTROLLING SECURE TRANSACTIONS USING A SINGLE PHYSICAL DEVICE, CORRESPONDING PHYSICAL DEVICE, SYSTEM AND COMPUTER PROGRAMME

摘要

The invention concerns a method for controlling secure transactions using a physical device (13) held by a user and bearing at least one pair of asymmetric keys, comprising a device public key (P₀) and a corresponding device private key (S₀). The invention is characterized in that said method includes the following steps: prior to implementing the physical device, a step of certifying said device public key (P₀) with a first certification key (S_T) of a particular certifying authority (10), delivering a device certificate (C₀) after verifying that said device private key (S₀) is housed in a tamper-proof zone of said physical device (13); a step of verifying said device certificate (C₀) by means of a second certification key (P_T) corresponding to the first certification key (S_T); in case of positive verification, a step of registering said user with a provider delivering a provider certificate (C_i) corresponding to the signature by said provider of said device public key (P₀) and an identifier (Id_i) of said user.