Why do you have to enter a verification code when you look up something!?

I've also seen it for a long time, so I say thank you!

Summary. 1. The user fills in his or her mobile phone number, clicks the "Get Verification Code" button, 2, ** or the APP generates an SMS verification code according to the rules, and sends the user's mobile phone number and the content of the verification code to the SMS platform through the SMS verification interface. 3. After a series of judgments and passes (account balance, content compliance, mobile phone number, and operator to which the mobile phone number belongs), the verification code SMS platform submits the information to the server of the corresponding operator.

4. The operator will deliver the SMS content to the user's mobile phone. In the same way, the process of retrieving your password and getting a coupon is similar to this.

When entering a verification code, do I click Enter code first, or click Get verification code first?

When you enter the code, click Get code.

1. The user fills in his or her mobile phone number, and clicks the "Get Verification Code" button 2. ** or the app generates an SMS verification code according to the rules, and sends the user's mobile phone number and the content of the verification code to the SMS platform through the SMS verification interface. 3. After a series of judgments and approvals (account balance, content compliance, mobile phone number compliance, and operator to which the mobile phone number belongs), the verification code SMS platform submits the information to the server of the corresponding operator. 4. The operator will deliver the SMS content to the user's mobile phone.

The process of retrieving the password and obtaining the coupon is similar to this.

1. The QQ password has been stolen and used by others to send advertisements or fraudulent messages without your knowledge, which is detected by the system.

2. Some people in the network (e.g., Internet café) are engaged in some behaviors that endanger the safety of QQ users.

3. The system detects that the province where you are currently logging in to QQ is inconsistent with the province where you are originally located (logins in games, web pages, mobile phones, clients, etc. are also included in the detection scope).

4. Use the QQ login of the AFK Fannian software, and enter the verification code every time you are prompted to avoid the abuse of the automated program, so as to ensure the safety of your QQ.

The need for a verification code effectively prevents number thieves from logging in to QQ with software in large numbers, and at the same time, it also reminds good users to hurry up security measures.

Let's put it simply

It's just that you're afraid that you will use the app to register accounts in bulk or keep trying to log in to one account. Because the verification code is generally only able to see what we really mean, and the program can't see it, which effectively restricts the ability to log in to the account or register an account by hand.

The function of the verification code: to effectively prevent such a problem for a specific registered user to use a specific program brute force cracking method to make continuous login attempts, in fact, the verification code is currently a particularly multi-network (Internet) site access method (Qi Li teased if China Merchants Bank's network (Internet) personal banking, Tencent's QQ community), we use a relatively simple way to achieve this function. Although it is a bit more difficult to log in, it is still necessary and important for the community.

However, we still remind everyone to protect their passwords, try to use more than 6 digits of passwords that are mixed with numbers, letters, and symbols, and do not use easy passwords such as 1234 or passwords that are the same or similar to usernames. Don't set a password at will just because you come to iclub to ask questions, and selling your own password to protect yourself is also to protect yourself, so as not to cause unnecessary trouble to yourself if you are stolen by others. ~

1）.Captcha is generally to prevent batch registration, and it looks difficult to the human eye, let alone a machine. At present, many network (Internet) sites have adopted verification code technology in order to prevent users from using robots to automatically register, log in, and irrigate.

The so-called captcha is a string of randomly generated numbers or symbols to generate a scramble map, add multiple interfering pixels (to prevent OCR), the user recognizes the captcha information by the naked eye, enters the form and submits the network (Internet) site for verification, and only after the verification is successful can a certain function be used.

2) Significance: In order to prevent users from using robots to automatically register, log in, and irrigate, many network (Internet) sites have adopted captcha technology. The so-called verification code is to generate a picture of a randomly generated number or symbol, add multiple interference pixels to the picture (to prevent OCR), and the user will recognize the verification code information by the naked eye, enter the form and submit it to the network (Internet) site for verification, and only after the verification is successful can a certain function be used.

Prevent malicious registrations and brute force attacks. The so-called malicious registration and brute force attack are carried out with software. No matter how fast the manual registration is, it also needs to enter the information one by one, which is very slow and has basically no impact on the server.

If you don't have a verification code, you can use the software to register, you can run thousands of threads at the same time, and you can register thousands of users at a time, so that the server's database will soon become bloated and the operation efficiency will be reduced. If a boring person or competitor is hostile to someone, then this method can easily paralyze the other person. If the server itself cannot effectively verify and reject this illegal operation, it will seriously consume its system resources, reduce the performance of the network resistance station and even crash the program.