| 摘要 |
<p>[PROBLEMS] To provide a magnetic card reader system in which a magnetic head and a computer can determine mutual validity, and unauthorized duplication of the magnetic card can be prevented. [MEANS FOR SOLVING PROBLEMS] In a magnetic card reader system (10), a computer (13) and a microprocessor perform authentication of each other. When the mutual authentication is successful, the microprocessor encrypts a digital signal and transmits the encrypted digital signal to the computer (13), and the computer (13) decodes the encrypted digital signal.</p> |
