HANDY TERMINAL AND PAYMENT METHOD USED FOR THE HANDY TERMINAL

摘要

There is provided a handy terminal in which inputting of an application program and of a PIN is executed and a keyboard and a display device are commonly used thus security is secured with a simple system. A card reader control program 23b in the keyboard unit memory 23 detects an insertion state of a credit card and notifies a detected key cord from the keyboard control program 23a to a payment program on the main board 2. A main CPU 12 calculates a program hash value provided to the payment program and a program hash value at the time of execution of a payment program 11b and encrypts and decrypts these hash values using a secret key, encrypted key, and public key so that these hash values are not stolen. The main CPU 12 compares the program hash value provided to the payment program 11b with the program hash value to be used at the time of the execution of the payment program 11b.