How to use the secondary authentication password?

There is a business project on the mobile website. Generally, a password will be sent to your mobile phone, which is the second authentication password.

Secondary authentication is set for the confidentiality and security of user data. First, the service password is used for primary authentication, and then the secondary authentication password is sent to the customer's mobile phone through random SMS, and the customer enters the secondary authentication password to confirm his identity.

Generally used for the first authentication after login, such as the website of 10086. If you need to operate more sensitive operations, such as checking the phone bill, you need to carry out stricter verification again, such as SMS dynamic password verification, which is called secondary authentication.