Today, NFC is becoming more and more popular. People often ask about the advantages and disadvantages of QR code and NFC. The low price of the QR code is very popular at the low price, and NFC is only available in the payment industry in China. A pre-existing science, the attention of the three major operators, and the support of major banks made NFC hot. But this also creates an illusion for NFC that NFC is only used in the financial industry, and only the giants can participate. For a communication technology, the application in the financial field is only the tip of the iceberg. The entire application environment of NFC in China needs to be cultivated. In the development of NFC, there will inevitably be a field that touches the two-dimensional code, and the two-dimensional code cannot bypass the NFC technology. Here, the mobile payment network will discuss the entanglement between the two-dimensional code and NFC from the technology, application and prospects.
technology
The definition of the two-dimensional code: the two-dimensional code is a black and white graphic that records the data symbol information in a plane (two-dimensional direction) with a certain geometric pattern according to a certain rule, and is skillfully utilized in the code composing to constitute the computer interior. The concept of the logic-based "0", "1" bit stream uses a number of geometric shapes corresponding to binary to represent literal value information, and is automatically read by an image input device or an optical scanning device to implement automatic information processing.
NFC definition: 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 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 for M2M (Machine to Machine) communication in handheld devices such as mobile phones. Security.
QR code: QR code is a codec mode, its application is to carry information, as a one-way read voucher, as a (unique) identification mark, and NFC is a communication method. For communication mode, its application is two-way. Information interaction (reader mode is read, card emulation mode is read, peer-to-peer mode is interactive).
The two-dimensional code can be transmitted over the network, the cost is low, the copyability is strong, and the application can be widely applied. The disadvantage is that the reading is slow, the two-dimensional code has higher requirements on the position of the reader, and the content of the two-dimensional code cannot be reset. . The two-dimensional code scheme is cheap and the audience threshold is low, just a smart phone. However, the information is read slowly, and the use of large traffic areas is minimal. Scanning takes a lot of time.
NFC, only for the interaction between physical and physical, but high security, fast reading, only need a reading distance of 2-5CM, reading position requirements are low, and the label content can be reset. In the NFC solution, the tag cost is high, the terminal equipment is required to be high, and the effect is fast, which is suitable for a place with a large amount of traffic. User experience number, but NFC equipment still needs a certain popularity time in China. The tags are encrypted and security is guaranteed. Scanning does not take much time.
Application Analysis
The typical application of QR code is WeChat. Through the unique WeChat QR code of each account, friends can be added to each other. At the same time, it is also possible to send the QR code to the Web and present the image for scanning, and there is no carrier requirement, as long as the QR code can be completely rendered, the content can be read. The two-dimensional code to be applied, the lowest threshold is to have a device to read the QR code and a carrier that can fully present the QR code image. The former, the current smart phone is basically available, both, regardless of the virtual screen display, or The physical paper can guarantee the integrity of the QR code to complete the reading task. Not only that, the QR code can also beautify the unit squares to expand deep commercial use.
The same is social media, Sina Weibo also introduced NFC mutual powder function, to achieve this function must be installed on both sides and open the Sina Weibo support NFC client, while the NFC function of the NFC mobile phone is turned on, after the two mobile phones touch Can complete the mutual powder action. Compared with the QR code, a two-dimensional code call is omitted, and the other party is aiming at the reading process.
NFC, in practical applications, can be explained as an example. In daily life, WiFi connection is a common problem. If the WiFi provider posts the account and password, it will appear as a network phenomenon. It will be asked again and again. In this regard, the QR code solution is to integrate the account and password into the QR code. Users who need WiFi need to scan with the mobile phone. After obtaining the account and password, they are connected and input. The QR code is equal to an open type. The encryption adds a linker. For NFC, the application tag is programmed. The phone that needs to connect to WiFi only needs to be touched in front of the tag, and the phone can be automatically connected without typing.
But the downside is that NFC must be an entity, and the word "near field" also prevents NFC from transmitting information remotely. Its shortcomings and advantages are also "near-field", the near-field makes the security greatly improved, and the tag read permission and reset permission can be performed.
Another application that is more used is the application of billboards. There are basically no billboards with NFC tags embedded in China, and the two-dimensional code billboards are everywhere. Most of the foreign countries are a combination of two-dimensional code and NFC, and they are now discussed in two ways. Single-dimensional code, the advantage is low cost, low threshold, smart terminal can read, but the reading time is long, from opening the QR code reading software to aiming the QR code to complete the scanning, it takes about 5 seconds, and The scanner needs to stop the precise scan, which is fatal in areas with high traffic. In contrast, NFC reading only needs a touch of approximate location, it can complete the reading, convenient and fast, and the advertising content can be changed at any time and quickly.
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