The invention relates to a terminal (3) for the strong authentication of a user, comprising:—a reader (31, 34) of a user's authentication parameters;—a receiver of a geolocation signal (33);—an interface (37) for communication with another apparatus;—and a processor (38), extracting the date and time of the geolocation signal, generating encrypted data comprising authentication parameters read by the reader and the date and time extracted, and ordering the transmission of said encrypted data by way of the communication interface (37).