method for improving the missbrauchsschutzes in a smart card and a smart card for implementing the procedure

摘要

The invention concerns a method for enhancing security against improper use of a smart card and a smart card, in particular a subscriber identification module (SIM) to be used in mobile communication terminals, to implement said method. The invention aims at improving a protection mechanism against the improper use of a SIM card so that the latter remains active, even when an unauthorized third party uses a mobile terminal with an activated SIM card (standard PIN of the SIM card already input or temporarily disabled), the SIM card being not blocked at the network. Therefor, an additional personal identification number concerning an activity is only known to the legitimate user and must be properly input, even when the terminal is on.