Definition:

　　An SMS dynamic password, also known as an SMS code, is a 6-8 digit random number sent via mobile SMS, serving as a form of mobile dynamic token. The identity authentication system sends a random 6 to 8-digit password to the customer's mobile phone via SMS, and the customer enters this dynamic password during login or transaction authentication, ensuring the security of system identity verification.

　　Security:

　　The password is distributed through communication channels, making it difficult to intercept, ensuring security and reliability.

　　Each password is used only once and is event-based, so there is no need to remember the password.