Transaction authentication system

Details Transaction authentication system Transaction authentication system

G - Physics

07

F

354/33, 352/53.2

G07F 7/10 (2006.01) G06K 19/07 (2006.01)

Patent

CA 1319432

ABSTRACT OF THE DISCLOSURE 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 a transaction data which is related to a transaction and a designated storage region in a second memory for storing the transaction data to the IC card when the IC card makes an access 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 verified 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 a transaction historical information which includes at least the designated storage region, the transaction data and the verified data and stores the transaction historical information in the first memory, so that a transaction is authenticatable from a correspondence of the verified data stored in the first memory and the verified data stored in the second memory.

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