A service request is received by a terminal device. First biometric authentication information of a user associated with the service request is collected. The first biometric authentication information is compared with preset biometric authentication information. When the comparison shows that the first biometric authentication information and the preset biometric authentication information are consistent, a pre-stored digital signature certificate private key is read. The service request is digitally signed according to the digital signature certificate private key. A biometric information verification message is generated and sent message to a server. The server is configured to read a pre-stored digital signature certificate public key corresponding to the digital signature certificate private key. Authentication result information is receiving from the server after the server verifies and signs the biometric information verification message according to the digital signature certificate public key.