Method and system for identity authentication by finger print USBkey

The invention discloses an identity authentication method by a fingerprint USBkey and includes the following steps: (1) the fingerprint information of users is recorded into the fingerprint USBkey and the information is saved in advance; (2) at least a digital certificate generated, which comprises the following steps: firstly, a pair of private and public keys are generated in the fingerprint USBkey; the relevant information of the public keys and the digital certificate is sent to a CA center and generating the digital certificate by the CA center; (3) each digital certificate and corresponding private keys stored and encrypted on the fingerprint USBkey; (4) when a user terminal communicates with a processing platform, the fingerprint USBkey at the user terminal firstly checks the fingerprints, digital signature is carried out on the data to be sent by the corresponding private keys and the data is transmitted to the processing platform for identity authentication. The method permits the digital signature after the fingerprints authentication succeeds; the loophole of PIN code input and transmission does not exist in the whole interactive process, which improves the transaction security to the utmost extent.