US Patent 9692754 Ensuring the security of a data transmission

Ensuring the security of a data transmission by verifying an identity of a user, comprising: a prior step of enrolling a terminal of the user, comprising: an association of a authentic identity data item of the user and a data item of a terminal available to the user and communicating via a network, the association being stored with data for contacting the terminal via the network, and a determination of an identity derived from at least said information, stored in the memory of the terminal, in correspondence with a data item specific to the user, for the purposes of a later strong authentication based on both the data item specific to the user and on the derived identity, as well as a current step of verifying the user identity.