A method for real time protection against unsolicited access to authentication information known by a legitimate end-user, the method comprising the following steps: - determining by a SIM card whether information coming from a telecommunication operator have to be authenticated or not, - visually indicating, by a secure mode indicator, that said information coming from a telecommunication operator is authentication information, said secure mode indicator being driven by a SIM card, - enabling a regular microcontroller by a switch when said information is not authentication information, said regular microcontroller being driven by the SIM card and connected to a first output of said switch, said switch being connected to an output of the SIM card such as to be driven by said SIM card, said regular microcontroller being accessed by an operating system, - enabling a dedicated microcontroller by the switch when said information is authentication information, said dedicated microcontroller being driven by the SIM card and connected to a second output of said switch or combined with the switch so as to define one single electronic component, - presenting information by a hardware information presentation means, - inputting information by an input means, wherein, when said information is not authentication information, said hardware information presentation means and said input means are accessed by said regular microcontroller, and when said information is authentication information, the method implements one of the following steps based on wirings between said switch and the regular microcontroller in view of the authentication information: a) said hardware information presentation means and said input means are exclusively accessed by said dedicated microcontroller, or, b) said input means and an additional hardware information presentation means are exclusively accessed by said dedicated microcontroller, said additional hardware information presentation means displaying inputted information from said input means, or, c) an additional hardware information presentation means and an additional input means are exclusively accessed by said dedicated microcontroller, said additional hardware information presentation means displaying inputted information from said additional input means. - determining by a SIM card whether information coming from a telecommunication operator have to be authenticated or not, - visually indicating, by a secure mode indicator, that said information coming from a telecommunication operator is authentication information, said secure mode indicator being driven by a SIM card, - enabling a regular microcontroller by a switch when said information is not authentication information, said regular microcontroller being driven by the SIM card and connected to a first output of said switch, said switch being connected to an output of the SIM card such as to be driven by said SIM card, said regular microcontroller being accessed by an operating system, - enabling a dedicated microcontroller by the switch when said information is authentication information, said dedicated microcontroller being driven by the SIM card and connected to a second output of said switch or combined with the switch so as to define one single electronic component, - presenting information by a hardware information presentation means, - inputting information by an input means, a) said hardware information presentation means and said input means are exclusively accessed by said dedicated microcontroller, or, b) said input means and an additional hardware information presentation means are exclusively accessed by said dedicated microcontroller, said additional hardware information presentation means displaying inputted information from said input means, or, c) an additional hardware information presentation means and an additional input means are exclusively accessed by said dedicated microcontroller, said additional hardware information presentation means displaying inputted information from said additional input means.