Abstract: Disclosed is a method of authorizing a user for accessing a server and/or for receiving of an on-line service and the steps of: capturing biometric data of the user using the sensor on a ME; forming from the biometric data a biometric template on the IDS and storing the biometric template on the MED; and via the IDS allowing access to a server by the user providing to the IDS, via the MED, matching biometric data and a biometric template. On the MED, a local check can be made for a match between biometric data of the user that are captured using the sensor on the MED and biometric data read out of the memory.

Abstract: Disclosed is a method of authorizing a user for accessing a server and/or for receiving of an on-line service and the steps of: capturing biometric data of the user using the sensor on a ME; forming from the biometric data a biometric template on the IDS and storing the biometric template on the MED; and via the IDS allowing access to a server by the user providing to the IDS, via the MED, matching biometric data and a biometric template. On the MED, a local check can be made for a match between biometric data of the user that are captured using the sensor on the MED and biometric data read out of the memory.

Abstract: A method of securing a transaction carried out by a user having a computer unit connected to a computer server via a computer network, the user having a telecommunications terminal arranged to access a telephone network. The method includes a prior step of registering a synchronization parameter in the terminal, which parameter is shared with the server and varies in synchronized manner in the terminal and in the server. When the terminal cannot be connected to the telephone network, authentication is performed from a temporary code calculated by the terminal on the basis of the synchronization parameter and of a personal code of the user.