Abstract: The present invention relates to a method for authenticating a user (Ui) requesting a transaction with a service provider (SP), which comprises: using authentication data (dauth) read on a screen by means of a mobile terminal (TEL) to generate (E) an authorization code (cod.) that is specific to the user and to the requested transaction; reading (F) the authorization code, displayed by the mobile terminal, using a reading means of a digital device (PC); and sending (G) the read authorization code from said digital device to the service provider in order to authenticate the user.

Abstract: A device (D1) is dedicated to the processing of signals to be transmitted by waves, within a communication terminal (T). This device (D 1) includes i) memory (M1) for temporarily storing a sequence of digital samples of an analogue input signal according to a first sampling frequency and in a manner synchronized with respect to starts of periodic time slots, and ii) digital/analogue conversion (CV2) for generating, during each time slot and according to a second sampling frequency equal to N times the first sampling frequency, with N an integer strictly greater than 1, an analogue output signal, to be transmitted, representative of N repetitions of the sequence of digital samples that is stored in the memory (M1) during the time slot concerned, so as to output the analogue signal according to a symbol rate equal to N times a reference symbol rate.

Abstract: The present invention relates to a method for authenticating a user (Ui) requesting a transaction with a service provider (SP), which comprises: using authentication data (dauth) read on a screen by means of a mobile terminal (TEL) to generate (E) an authorisation code (cod.) that is specific to the user and to the requested transaction; reading (F) the authorisation code, displayed by the mobile terminal, using a reading means of a digital device (PC); and sending (G) the read authorisation code from said digital device to the service provider in order to authenticate the user.

Abstract: A device (D1) is dedicated to the processing of signals to be transmitted by waves, within a communication terminal (T). This device (D1) comprises i) memory means (M1) for temporarily storing a sequence of digital samples of an analogue input signal according to a first sampling frequency and in a manner synchronized with respect to starts of periodic time slots, and ii) digital/analogue conversion means (CV2) for generating, during each time slot and according to a second sampling frequency equal to N times the first sampling frequency, with N an integer strictly greater than 1, an analogue output signal, to be transmitted, representative of N repetitions of the sequence of digital samples that is stored in the memory means (M1) during the time slot concerned, so as to output the analogue signal according to a symbol rate equal to N times a reference symbol rate.

Abstract: A device (D) is dedicated to the processing of data by spread spectrum coding for a multi-beam communication satellite (S), each beam (B1-B6) of which is associated with a terrestrial cell (C1-C6) contained in a satellite coverage zone (ZC).