METHOD FOR PROTECTION OF A CHIP CARD FROM UNAUTHORIZED USE, CHIP CARD AND CHIP CARD TERMINAL

摘要

The invention relates to a method for protection of a chip card (104) from unauthorized use. The method comprises the following steps: inputting a first identification (116) into a chip card terminal (100), producing a cipher of at least one first communication parameter (K1; KA1, D1) using a first symmetric key (S1) derived from the first identification, a protected first communication channel (112) being definable between the chip card terminal and the chip card, using the communication parameter, transmitting the cipher via a predefined communication channel (108) from the chip card terminal to the chip card, attempting to decrypt the cipher using a second symmetric key (S2) by means of the chip card, the result of decryption only being the first communication parameter if the first symmetric key is identical to the second symmetric key so that the protected first communication channel can only be defined between the chip card terminal and the chip card if the first identification is correct.