What is the significance of verification code when logging in? Why is Baidu so annoying? Enter the verification code every time.

What is the significance of verification code when logging in? Why is Baidu so annoying? Enter the verification code every time. The verification code is to prevent automatic login.

What's the point of entering a verification code? Why do I have to enter the verification code every time? What's the purpose? The role of verification code: effectively prevent this kind of problem from constantly trying to log in to a specific registered user by using a specific program brute force cracking method. In fact, using verification code is a popular way for many websites (such as online personal bank of China Merchants Bank and QQ community of Tencent), and we have also realized this function in a relatively simple way. Although it is a bit troublesome to log in, this function is still necessary and important for the community. However, we still remind everyone to protect their passwords, try to use passwords with more than 6 digits, including numbers, letters and symbols, and do not use simple passwords such as 1234 or passwords with the same or similar user names. Don't set your password just because you come here to ask questions. Protecting your password is also protecting yourself, so as not to steal your account and bring yourself unnecessary trouble. ~

(1). The verification code is generally used to prevent batch registration, and it is difficult for people to see it, let alone the machine. Second, if Baidu Post Bar doesn't log in and post, you probably need to enter a verification code to prevent a large-scale anonymous reply. At present, many websites adopt verification code technology to prevent users from using robots to automatically register, log in and irrigate. The so-called verification code is to generate a picture from a series of randomly generated numbers or symbols, and add some disturbing pixels to the picture (to prevent OCR). Users can identify the verification code information with naked eyes, enter the form and submit it to the website for verification. Only after the verification is successful can a function be used.

(2) General user ID registration places and major forums should enter verification codes.

(3). Universal verification code

1, four digits, a random number string, the most original verification code, the verification effect is almost zero. 2.CSDN website users log in in GIF format, which is a commonly used random digital picture verification code. The characters in the picture are quite satisfactory, and the verification effect is better than the last one. People without basic knowledge of graphics and imaging can't break it! It's a pity to read its program. It seems to have been released in the forum on the first day of CSDN use. What a pity!

3.QQ website users log in in PNG format, and the pictures use random numbers and random capitalized English letters. The whole composition is a bit grandiose, and each character will change its position every time it is rearranged! Sometimes the pictures that come out can't be recognized by human eyes, which is amazing ... 4. When 4.MS applied for hotmail, it was in BMP format, with random numbers+random capital letters+random interference pixels+random positions.

5. Google registered Gmail in JPG format, with random English letters+random color+random location+random length. 6. Other forums are random content in XBM format.

(4) Significance: Many websites use verification code technology to prevent users from automatically registering, logging in and pouring water by robots. The so-called verification code is to generate a picture from a series of randomly generated numbers or symbols, and add some disturbing pixels to the picture (to prevent OCR). Users can identify the verification code information with naked eyes, enter the form and submit it to the website for verification. Only after the verification is successful can a function be used.

Why does WeChat login have to enter the verification code every time? Because the account protection page is opened, WeChat login must enter the verification code every time. You can apply to turn off account protection by prompting (the micro-signal must bind QQ number and mobile phone number and turn on account protection to use this function).

Apply for account closure protection:

1. Check QQ number and QQ password: Please log in with QQ number bound to WeChat account;

2. Check the last four digits of the mobile phone number: Please enter your mobile phone number bound by WeChat;

3. WeChat friend verification: in the alternate friend list, select a friend for verification (not less than 1 friend), and then contact WeChat friends to inform you of the verification code, so that friends can send the verification code to your WeChat via WeChat;

Note: You can select more than 2 friends to send verification codes, which can directly turn off account protection; If only 1 friends are successfully verified, the account protection can be released after 24 hours.

The following conditions must be met before successful dissolution:

1. After submitting the account cancellation application, the micro signal failed to log in successfully. If the micro-signal after submitting the account cancellation application has been logged in, or the application is made on WeChat, the application will be invalid immediately.

2. No less than 1 The alternate friend passes the system verification after sending the verification code.

Friend verification needs to send verification code within 12 hours. If it exceeds 12 hours, you need to reapply.

Enter the verification code every time you log in to QQ. How can I remove the verification code? 1. When logging in to QQ, you are always prompted to enter the verification code. Here are the login location and login protection settings. To set login protection.

2. Download and install the device lock.

3. Open QQ, find me in the column below and find the settings. If you can't see it, drag the screen up.

4. Find the device lock and security, and just upgrade the device lock here.

5. Set the gesture password according to the prompt, and click Create. After setting, the phone password will be locked and opened.

6. After returning to the settings, I found that I should upgrade the device lock. Click to unlock the device and fill in the verification code sent to the mobile phone.

7. After confirmation, the mobile QQ and the computer QQ are disconnected at the same time. The mobile QQ is allowed to log in with a gesture password, while the computer QQ is logged in for the first time, so it is allowed to scan the QR code or use the mobile phone for verification.

8. Prompting for confirmation after scanning is a bit like logging in to WeChat on a web page. After confirmation, the system will prompt you that QQ has logged into the computer.

How does Sina Weibo cancel the login? Enter the verification code in the account every time, click the account, then click the account settings and then click login protection, and it should be cancelled.

Why do you have to enter the verification code when logging in online, and everyone knows the account password? What's the significance of verification code? Because the verification code can protect the account. Verification code can effectively prevent this kind of problem from repeated login attempts to specific registered users by using specific program brute force cracking method. In fact, it is a common way for many websites (such as online personal banking of China Merchants Bank and QQ community of Tencent). We have implemented this function in a relatively simple way. Although it is a bit troublesome to log in, this function is still necessary and important for the community. However, we still remind everyone to protect their passwords, and try to use passwords with more than 6 digits, letters and symbols, instead of simple passwords such as 1234 or passwords with the same or similar user names. Significance: Many websites use verification code technology to prevent users from automatically registering, logging in and pouring water by robots. The so-called verification code is to generate a picture from a series of randomly generated numbers or symbols, and add some disturbing pixels to the picture (to prevent OCR). Users can identify the verification code information with naked eyes, enter the form and submit it to the website for verification. Only after the verification is successful can a function be used.

You must enter a verification code to log in to Baidu. Is there an upper limit for the number of incorrect input of verification code? This does not seem to be the case. It's best not to rush in. If you are not sure, just click "Can't see clearly or change" next to it.

Qq Login Question Why do I have to enter the verification code every time I log in? Because you have logged into pip before, you will be asked to enter the verification code for your QQ security.

Why do I have to enter the verification code every time I log in to QQ games? It is because your IP address is moving that you automatically get your IP. To protect your QQ, you must enter it in Beijing and Nanjing. After you go to the internet cafe, you don't need to go in another day.