1. Bank authentication failure means that when a credit card is swiped, it is displayed that the bank card authentication is required to verify whether the user has access to the system, and authentication failure means access failure.

2. Authentication In order to verify whether the user has access to the system, the mainstream authentication method is to use authentication authorization to verify the correctness of the digital signature. Traditional authentication is verified by password. The premise of this method is that every user who obtains the password is authorized.