Abstract: A method for securing an entry in a user database, the method being performed in a management server in charge of the database and comprising the steps of: receiving a network identifier of a user terminal, identifying the user terminal in a telecommunications network; transmitting to a network platform an operator of the telecommunications network a user confirmation request, the request comprising the network identifier of the user terminal; upon receiving a user confirmation from the network platform, creating an entry by the terminal user in the user database, the entry comprising the network identifier of the user terminal.

Abstract: A user device configured to connect to a mobile telephony network and associated with an identification number in the mobile telephony network. The user device selects a method of paying for the shopping basket on a first page of the merchant server; upon selection, the user device sends a payment request to a payment validation module, which is enriched with identification data of the user device; the user device receives a local authentication request message from the payment validation module over the mobile telephony network; on receiving the local authentication request message, the user device triggers execution of an operation of locally authenticating a user of the user device; the user device sends a local authentication response message to the payment validation module; and the user device is redirected by the payment validation module to a second page of the merchant server giving the result of the payment transaction.

Abstract: A method for securing an entry in a user database, the method being performed in a management server in charge of the database and comprising the steps of: receiving a network identifier of a user terminal, identifying the user terminal in a telecommunications network; transmitting to a network platform an operator of the telecommunications network a user confirmation request, the request comprising the network identifier of the user terminal; upon receiving a user confirmation from the network platform, creating an entry by the terminal user in the user database, the entry comprising the network identifier of the user terminal.

Abstract: A method for checking the validity of a transaction has the following steps, implemented at a server entity: receiving a transaction request made in a current place for a user of a mobile terminal, the request being an item of data depending on an identifier of the terminal, on the basis of the identifier of the terminal; consulting a database storing previous location data of the terminal; checking the consistency between the current place and said previous locations of the terminal; and determining an action in response to the transaction request, on the basis of the consistency check.

Abstract: A user device configured to connect to a mobile telephony network and associated with an identification number in the mobile telephony network. The user device selects a method of paying for the shopping basket on a first page of the merchant server; upon selection, the user device sends a payment request to a payment validation module, which is enriched with identification data of the user device; the user device receives a local authentication request message from the payment validation module over the mobile telephony network; on receiving the local authentication request message, the user device triggers execution of an operation of locally authenticating a user of the user device; the user device sends a local authentication response message to the payment validation module; and the user device is redirected by the payment validation module to a second page of the merchant server giving the result of the payment transaction.