What is dynamic SMS?

Short message dynamic password, also known as short message password, is a 6-digit random number dynamic password sent in the form of short message, and it is also a mobile phone dynamic password form. The identity authentication system sends a random 6/8-digit password to the customer's mobile phone in the form of short message, and the customer enters this dynamic password when logging in or authenticating the transaction, thus ensuring the security of the system identity authentication.