TRANSACTION TERMINAL DEVICE, TRANSACTION PROCESSING METHOD, AND TRANSACTION PROCESSING SYSTEM

摘要

A transaction terminal device connected to a settlement destination device includes a non-secure first information processing unit, and a secure second information processing unit. The first information processing unit includes a settlement processing unit that performs a transaction settlement process, and a certificate request transmitting unit that transmits a request for a certificate indicating regularity of the settlement destination device to the settlement destination device. The second information processing unit includes a signature verifying unit that verifies legality of a signature obtained by encrypting at least a part of a program code for operating the settlement processing unit. The certificate request transmitting unit transmits the request for the certificate to the settlement destination device when the legality of the signature is verified by the signature verifying unit. The settlement processing unit performs a settlement process between the settlement destination device and the transaction terminal device by using the certificate.