| 摘要 |
PROBLEM TO BE SOLVED: To prevent the illicit acquisition of card data and the use of unlawful cards from developing. SOLUTION: In the case 35c of a magnetic head 35, a demodulation circuit 37 for demodulating card data on the receipt of the output signal of a magnetic head main body and an encipherment circuit 38 for enciphering the demodulated card data are provided. At the same time, the image data of a character line train displayed by embossing on the surface of the magnetic card 1 are detected with an embossed character sensor 40. Then, the enciphered data is decoded by a decoding means 47. The character data string corresponding to the character string displayed by embossing on the basis of the image data is obtained by a character recognizing means 48 so as to judge whether the data string in the predetermined bit range of the decoded card data coincides with the character data string or not by a judging means 49. Only when the data trains are judged to be coincided with each other, a communication for authentication is performed to the predetermined center. |
