USB DIGITAL AUTHENTICATION CONTROL METHOD AND ATM AND POS TERMINAL APPLIED TO THEREOF

摘要

A USB digital authentication control method includes the steps: an interface circuit sends a signal to a controller of a work host after a USB Key is inserted into a USB interface by an owner; the controller sends a series of random plaintext to the USB Key to request encryption; the USB Key generates a cryptograph after encrypting the random plaintext and sends the cryptograph and a digital certification to the controller; the controller finds a CA authentication center through the Internet according to the digital certification to authenticate and extract a corresponding common key, decrypts the cryptograph using the common key to generate the decrypted plaintext and compares the decrypted plaintext with the random plaintext; when the comparison result is same, the controller acquires the related information of a bank account associated with the digital certification by a bank system host to operate for the owner. AN ATM and a POS terminal are disclosed. Due to an application of using the combination of the USB interface structure and the digital certification, the USB Key can manage all of the bank account, acquire a good conveniency and security.