Bank card authentication is a verification service consisting of bank card number+name+ID number+bank reserved mobile phone number, which mainly includes two-factor authentication, three-factor authentication and four-factor authentication. If the verification is successful, it means that my information is true and effective, and the risk is small; If the verification is unsuccessful, it means that the information is wrong, and some risks can be filtered in the early stage.

When swiping a card, it shows that bank card authentication is required to verify whether the user has access to the system. The mainstream authentication method is to use authentication authorization to verify the correctness of digital signature.

Authentication includes two aspects:

1. User authentication: the network authenticates users to prevent illegal users from occupying network resources.

2. Network authentication: users authenticate the network to prevent users from accessing illegal networks and being defrauded of key information.