PROCEDE DE SECURISATION D'UN TERMINAL MOBILE DE TELECOMMUNICATION

摘要

The procedure for securing a mobile telephone terminal against theft includes requesting the user to enter a personal password (PASS) after placing the SIM card in the terminal. This password is recorded in the (U)SIM card and used to valid subsequent operation of the phone. The procedure for securing a mobile telephone terminal against theft includes an initialization stage (I). The initialization stage (I) includes requesting the user to enter at least one personal password (PASS) after placing the SIM card in the terminal. This password is recorded in the (U)SIM card and in the memory of the terminal. For subsequent operations (II) operation includes verifying the password using both the password recorded on the card and that provided by the user, and blocking operation of the telephone is there is disagreement between these passwords. The system may allow a fixed number of attempts to enter the correct password into the device, and if this fails then the SIM card is permanently disabled.