Nowadays, NFC is becoming more and more popular, people often ask what are the advantages and disadvantages of QR codes and NFC. QR codes have been widely popularized due to their low price and low threshold, while NFC is only available in the payment industry in China. In the early stage of popular science, the attention of the three major operators and the support of major banks have made NFC hot. But this also creates a false impression for NFC, that is, NFC is only used in the financial industry, only the giants can participate. For a communication technology, the application in the financial field is just the tip of the iceberg, and the entire NFC application ecological environment in China needs to be cultivated. In the development of NFC, there will inevitably be areas where two-dimensional codes touch, and two-dimensional codes cannot bypass the NFC technology. Here, the mobile payment network will discuss the entanglement between the two-dimensional code and NFC from technology, application and prospects.
technology
Definition of two-dimensional code: Two-dimensional code is to record data symbol information with a certain geometric figure in a black and white pattern distributed on a plane (in two-dimensional direction) according to a certain rule. The logic-based concepts of "0" and "1" bitstreams use several geometric shapes corresponding to binary to represent textual numerical information, which are automatically read by image input devices or photoelectric scanning devices to achieve automatic information processing.
Definition of NFC: It is a short-range high-frequency wireless communication technology that allows non-contact point-to-point data transmission (within ten centimeters) to exchange data between electronic devices. This technology has evolved from contactless radio frequency identification (RFID) and is backward compatible with RFID. It was first developed by Sony and Philips. It is mainly used in mobile phones and other handheld devices to provide M2M (Machine to Machine) communication. It has natural Security.
Two-dimensional code: Two-dimensional code is a coding and decoding method, its application is to carry information, as a one-way read credential, as a (unique) identification mark, and NFC is a communication method. For the communication method, its application is two-way Information interaction (card reader mode is reading, card simulation mode is being read, and point-to-point mode is interaction).
The QR code can be transmitted on the network, with low cost, strong reproducibility, and can be used in a large range. The disadvantage is that the reading is slow. The QR code requires a higher position for the reader and cannot reset the content of the QR code. . The QR code solution is inexpensive and the audience threshold is low, requiring only a smartphone. However, the information reading is slow, and the effect of using in areas with large traffic is very small. Scanning takes more time.
NFC is only suitable for physical-to-physical interaction, but it has high security and fast reading speed. It only needs a reading distance of 2-5CM, the reading position requirement is low, and the label content can be reset. The NFC solution has high tag cost and high requirements on terminal equipment. In terms of effect, it can be read quickly and is suitable for places with high traffic volume. User experience number, but NFC equipment still needs a certain amount of popularization time in China. The label can be encrypted and the security is guaranteed. Scanning does not take much time.
Application Analysis
The typical application of QR codes is WeChat. Through the unique WeChat QR code of each account, friends can be added to each other. At the same time, you can also send the QR code to the Web and present the image for scanning. There is no carrier requirement, as long as the QR code can be completely presented, you can read the content. To apply QR codes, the lowest threshold is to have a device that reads the QR code and a carrier that can fully display the QR code image. The former is now basically available in smartphones. Both, whether it ’s a virtual screen display or The physical paper can ensure the integrity of the QR code to complete the reading task. Not only that, the QR code can also beautify the cell grid and expand deep-level commercial use.
The same is social media, Sina Weibo also introduced the NFC mutual fan function, to achieve this function, both parties must install and open Sina Weibo's NFC-enabled client, and the NFC function of the NFC mobile phone is turned on, after the two phones touch Can complete the mutual fan action. Compared with the two-dimensional code, there is no need to call a two-dimensional code and aim at the reading process of the other party.
NFC, in practical applications, can give an example to explain, WiFi connection is a common problem in daily life, if the WiFi provider posts the account and password, there will be a phenomenon of taking advantage of the Internet, not posting Once again, he will be repeatedly asked. In this regard, the solution of the QR code is to integrate the account and password into the QR code. Users who need WiFi need to scan with their mobile phones. After obtaining the account and password, enter and connect. The QR code is equivalent to an open type. Encryption, a connection procedure was added. With NFC, the application tag is programmed, and a mobile phone that needs to be connected to WiFi only needs to be touched in front of the tag, and the mobile phone can be automatically connected without typing.
But the disadvantage is that NFC must exist physically, and the word "near field" also prevents NFC from transmitting information remotely. Its shortcomings and advantages also happen to be "near-field". The near-field greatly improves the security and can read and reset the tags.
There is also an application with a large number of billboards. There are basically no billboards embedded with NFC tags in China, but two-dimensional code billboards are everywhere. While most of the foreign countries are integrating two-dimensional codes and NFC, they are discussed separately in two ways. Single QR code has the advantages of low cost and low threshold, and can be read by smart terminals, but the reading time is long. It takes about 5 seconds from opening the QR code reading software to aiming at the QR code to complete the scan, and Scanners need to stop accurate scanning. In areas with high traffic, this weakness is fatal. In contrast, NFC reading only requires a touch of the approximate location to complete the reading, which is convenient and fast, and the advertising content can be changed at any time and quickly.
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