How to get verification code

According to the query of Baidu Library, the method of obtaining the verification code is as follows:

1. SMS verification code: send the verification code to the user's mobile phone via SMS, and the user will verify it after entering the correct verification code.

2. Email verification code: send the verification code to the user's email, and the user will enter the correct verification code for verification.

3. Graphical verification code: A picture containing random numbers or letters is displayed on the registration or login page, and the user needs to enter the correct verification code to continue the operation.

4. Voice verification code: the user is informed of the verification code by telephone voice, and the user enters the correct verification code for verification.

5. Third-party authentication: use the dynamic verification code generated by a third-party platform (such as Google Authenticator) for authentication.

6. Social account login verification: use the user's social account (such as WeChat and Facebook). ) for login verification, without entering the verification code.

7. Fingerprint or facial recognition: Fingerprint or facial recognition technology is used for identity verification, and no verification code is needed.