SMS sent several mobile phone ID verification codes.

1. Generally speaking, the verification number is only valid if it is sent to the corresponding mobile phone for login. If you receive a lot of verification numbers inexplicably, your mobile phone number may be leaked for some reason; 2. Or for some reason, your mobile phone number is bombarded by criminals using short messages, and constantly sends spam such as verification code to your mobile phone number; You can try to use third-party mobile phone housekeeper and other software to set up harassment interception to minimize harassing text messages.

CAPTCHA is the abbreviation of "automatic public Turing test to distinguish between computer and human", and it is a public * * * automatic program used to distinguish whether the user is a computer or a human. It can prevent malicious password cracking, ticket brushing and forum flooding, and effectively prevent a hacker from constantly trying to log in to a specific registered user and using a specific program to violently crack. In fact, using verification code is a popular way for many websites now, and we have realized this function in a relatively simple way.

Verification code can effectively prevent hackers from trying to log in to specific registered users by using specific programs to crack violently. In fact, using verification code is a popular way for many websites (such as online personal banking of China Merchants Bank and Baidu Community), and we have also realized this function in a relatively simple way. Although logging in is a bit troublesome, this function is necessary and important for the password security of netizens. However, we still remind you to protect your password, try to use a password with more than 6 digits, letters and symbols, and don't use a simple password such as 1234 or a password that is the same as or similar to your user name, so as to avoid unnecessary troubles caused by someone stealing your account.