Method for improving the protection against abuse in a chip card and a chip card for carrying out the method

摘要

The invention relates to a method for improving the protection against abuse in a chip card and a chip card, in particular a subscriber identity module SIM for use in mobile communication terminals, for carrying out the method. DOLLAR A The invention has the object of providing a protection mechanism against the misuse of a SIM such that it also acts actively when an unauthorized third party a mobile device with activated SIM (default PIN of the SIM already entered or default PIN temporary deactivated) and the SIM is not yet blocked on the network side. DOLLAR A The solution of the task is based on an additional "activity PIN", which is known only to the regular user and must be entered regularly even when the device is turned on.