What's the difference between the barcode and the QR code we are using now?

Two-dimensional code, also known as two-dimensional bar code, can be regarded as an upgrade of bar code. It is a black-and-white graphic distributed on a plane (two-dimensional direction) according to certain rules, which can "encode" related information such as words, images, audio and video into an image. This information will be displayed when these images are taken with special software.

Because the QR code technology is very mature, ordinary netizens can make QR codes according to their own wishes by searching for a QR code generator on the Internet. Take the QR code business card as an example. As long as you enter your name, phone number, mobile phone, email address and other information according to the prompt, the website can automatically generate the exclusive QR code business card online. "But for more commercial applications, the QR code needs to be encrypted after it is generated, which needs to be done by a professional company." The relevant person in charge of China Mobile Ningbo Branch said that at present, such encryption companies are mainly concentrated in Beijing, Shanghai, Guangzhou and other cities, and there are very few qualified enterprises in Ningbo.

It is reported that the technology of accessing the Internet by reading QR codes through mobile phones has reached 96% in Japan and South Korea, and it is still in its infancy in China. "However, once accepted by netizens, the application of QR code will show explosive growth," said an insider. Previously, the QR code on the real-name registration system train ticket leaked user information, which caused widespread concern. With the popularity of smart phones, the application of two-dimensional code is more and more extensive, and its security problems are becoming increasingly prominent.

Although the number of smart phones is increasing, there are still quite a few mobile phone terminals whose security level is not high enough, so it is difficult to realize the identity recognition of mobile phone platforms. According to industry insiders, not only that, mobile phone viruses can also spread through QR codes. "This kind of virus is disguised as a mobile phone chat software and provides a download link through a QR code. Once the user scans this QR code, it will automatically send a text message to the mobile phone to defraud the mobile phone bill. "