System for inputting, processing and securely transferring authentication data including: - at least one peripheral for interfacing with a user, said peripheral including secure communicating means and a secure operating mode both adapted for collecting authentication data, accessing a security component, and safely transferring the data by way of said communicating means, and - an interposition server including a security module, said security module including: - means for securely communicating with the interface peripheral operating in secure mode, - means for controlling the interface peripheral adapted so that the user inputs authentication data on said interface peripheral operating in secure mode, said controlling means being capable of processing said authentication data, - means for transmitting data such that all the data communications between the user of a workstation (5,6) and at least one remote server (9,10) transit by way of said interposition server. - means for analyzing the transiting stream of data capable of detecting an authentication request generated by the remote server (9,10) intended for the user of the workstation (5,6), said analyzing means being capable of then triggering the security module through the access means, and said security module being capable of initiating an authentication session with an authentication server, of activating the inputting of the authentication data of the user through the means for controlling the interface peripheral, in order for the user to input the authentication data on the interface peripheral, and of transmitting the authentication data to the authentication server. - at least one peripheral for interfacing with a user, said peripheral including secure communicating means and a secure operating mode both adapted for collecting authentication data, accessing a security component, and safely transferring the data by way of said communicating means, and - an interposition server including a security module, said security module including: - means for securely communicating with the interface peripheral operating in secure mode, - means for controlling the interface peripheral adapted so that the user inputs authentication data on said interface peripheral operating in secure mode, said controlling means being capable of processing said authentication data, - means for transmitting data such that all the data communications between the user of a workstation (5,6) and at least one remote server (9,10) transit by way of said interposition server. - means for analyzing the transiting stream of data capable of detecting an authentication request generated by the remote server (9,10) intended for the user of the workstation (5,6), said analyzing means being capable of then triggering the security module through the access means, and said security module being capable of initiating an authentication session with an authentication server, of activating the inputting of the authentication data of the user through the means for controlling the interface peripheral, in order for the user to input the authentication data on the interface peripheral, and of transmitting the authentication data to the authentication server. - means for securely communicating with the interface peripheral operating in secure mode, - means for controlling the interface peripheral adapted so that the user inputs authentication data on said interface peripheral operating in secure mode, said controlling means being capable of processing said authentication data, - means for transmitting data such that all the data communications between the user of a workstation (5,6) and at least one remote server (9,10) transit by way of said interposition server. - means for analyzing the transiting stream of data capable of detecting an authentication request generated by the remote server (9,10) intended for the user of the workstation (5,6), said analyzing means being capable of then triggering the security module through the access means, and said security module being capable of initiating an authentication session with an authentication server, of activating the inputting of the authentication data of the user through the means for controlling the interface peripheral, in order for the user to input the authentication data on the interface peripheral, and of transmitting the authentication data to the authentication server.