Abstract: A method for checking a confidence level associated with a first user account of an online service, each user account including associated user data and contact means, the method includes the steps of selecting at least one second user account, generating a first code, recording the first code in association with the first user account, sending a first message via a contact means associated with the second user account, the first message including the first code generated and, in subsequent steps, of receiving, from a first electronic device connected to the online service with the first user account, a second message including a second code and, when the second code is equal to the first code recorded in association with the first user account, then increasing the value of the parameter indicating the confidence level associated with the first user account of the online service.

Abstract: The invention relates to a method and system for supplying a token in a host card emulation system comprising first and second devices and a secure payment platform, the method comprises the steps of transfer by the second device to the first device an identifier of the second device, reception by the second device of a first token and an identifier of the second device, the first token being a symmetrical derivation of a second token of the first device with the identifier of the second device, transfer by the second device of a message comprising a cryptogram signed with the first token, the identifier of the first device and predetermined information indicating that the first token has been transferred by a third party.

Abstract: A method for checking a confidence level associated with a first user account of an online service, each user account including associated user data and contact means, the method includes the steps of selecting at least one second user account, generating a first code, recording the first code in association with the first user account, sending a first message via a contact means associated with the second user account, the first message including the first code generated and, in subsequent steps, of receiving, from a first electronic device connected to the online service with the first user account, a second message including a second code and, when the second code is equal to the first code recorded in association with the first user account, then increasing the value of the parameter indicating the confidence level associated with the first user account of the online service.

Abstract: A method is proposed for communicating an electronic transaction between a point of sale (1) and a transaction server (3) by way of a mobile terminal (2) being capable of connecting via an access network (R) for accessing the transaction server (3) via a main communication channel (C2), comprising the steps of: establishment of a near field communication channel (C1) with the point of sale (1), production of transaction data intended for the transaction server (3) on the basis of data transmitted by said channel (C1), verification of the availability of the main channel (C2), if said main channel (C2) is unavailable, sending of the produced transaction data along a secondary channel (C3) established with the point of sale so that the point of sale (1) can transmit the data to the access network (R).