PIN PAD CAPABLE OF SELF-DETECTING UNAUTHORIZED ATTACHMENT/DETACHMENT THEREOF, AND PIN PAD SECURITY METHOD USING SAME

摘要

The present invention relates to a PIN pad capable of self-detecting unauthorized the attachment/detachment thereof and to a PIN pad security method using the same. More particularly, the present invention relates to a PIN pad capable of self-detecting the unauthorized attachment/detachment thereof, and to a PIN pad security method using the same, in which a random key storage memory (SRAM) with predetermined random keys stored therein is installed within a PIN pad arranged in an automatic teller machine, and a switch of a battery for supplying power to the random key storage memory is automatically opened when the PIN pad is detached from the automatic teller machine, whereby automatically deleting the values of the random keys stored in the random key storage memory upon the detachment of the key pad, thus sensing the attachment/detachment of the key pad in a real time basis by comparison of the values of the random keys. The PIN pad capable of self-detecting the unauthorized attachment/detachment thereof according to the present invention comprises: a random key storage memory in which random keys are stored separately from each other; a main memory in which random keys and financial transaction processing information data are stored; a battery connected to the random key storage memory to supply power; and a CPU which generates random keys and stores the generated random keys into the random key storage memory and into the main memory. The connection of the battery to the random key storage memory is automatically controlled in accordance with the attachment/detachment of the PIN pad. The CPU compares random keys of the random key storage memory and of the main memory in a real time basis to sense the attachment/detachment of the PIN pad.