Apparatus and method for preventing a copy of terminal's unique information in a mobile terminal

PURPOSE: An apparatus and a method for preventing reproduction of terminal identification information are provided to prevent forgery and modulation of the terminal unit characteristic information in order to block a user form illegally using a portable terminal. CONSTITUTION: A memory unit(103) stores a first model class ID of a portable terminal and a root public key in an OTP(One Time Programmable) area. The root public key is a key for authenticating terminal ID information. The memory unit stores authentication information of the terminal ID information. If the authentication of the terminal ID information is requested, a control unit confirms the authentication information. The control unit authenticates the terminal ID information. [Reference numerals] (105) Code area; (107) Data area; (AA) Root public key; (BB) Model class ID; (CC) International mobile equipment identifier; (DD) International mobile equipment identifier signature; (EE) International mobile equipment identifier authentication certificate