Importance

Loading Importance Indicators...

Abstract

A transaction authentication system comprises a terminal, a first memory and an IC card which is detachably loaded into the terminal. The terminal supplies at least transaction data which is related to a transaction a designated storage region in a second memory stores the transaction data to the IC card when the IC card accesses to a service via the terminal. A second processor of the IC card writes the transaction data received from the terminal in the designated storage region of the second memory and generates a vertified data which is renewed every time the transaction data is written into the second memory. The verified data has a value in conformance with a predetermined generating algorithm and is stored in the second memory and also supplied to the terminal. A first processor of the terminal generates transaction historical information which includes at least the designated storage region, the transaction data and the vertified data and stores the transaction historical information in the first memory. Thus a transaction is authenticated from a corresponding of the verified data stored in the first memory and the verified data stored in the second memory.

Loading the Abstract Image...

First Claim