The inexplicable message sent is 233 online school verification code. What’s going on?

1. Mobile phone information is leaked. The mobile phone number that receives text messages is usually the mobile phone number bound to the identity during registration. Under normal circumstances, personal information needs to be protected and not disclosed at will to prevent property losses.

2. It is possible that someone else got the wrong number, causing the verification code to be sent to their mobile phone

3. The mobile phone may be infected with a virus, and others can directly obtain the verification code.

Mobile verification codes are sent to mobile phones. Large websites, especially shopping websites, all provide mobile phone SMS verification code functions, which can ensure the security of shopping more accurately and safely and verify the correctness of users. It is the most effective verification code system. Some verification code access providers provide SMS verification code services. Each website sends a request to the access provider's server through the interface. The server sends random numbers or letters to the mobile phone, and the access provider's server performs unified verification of the verification code.

The abbreviation of verification code is CAPTCHA, which is a public and fully automatic program that distinguishes whether the user is a computer or a human. Applying verification codes is a common method for many websites. It can not only prevent malicious password acquisition, ticket fraud, and forum flooding, but also effectively prevent a hacker from making continuous login attempts to a specific registered user by using a specific program to brute force. CAPTCHA questions are generated and judged by computers, but only humans can answer them. Computers cannot answer CAPTCHA questions, so users who answer the questions can be considered humans.