Fully understand the RFID technology, do not let the advantage become a disadvantage

1 background

With the popularization of RFID technology products, the application of NFC tag technology has become particularly important in commodities. Many products require that NFC tag can combine the functions of product line management, logistics management, asset management, traceability and anti-counterfeiting. The demand of the market is the biggest impetus for technological progress, and we can see that the products that can meet this requirement are gradually emerging in the market. Among them, the precious commodity comes more strongly to this demand than the general commodity.

Fully understand the RFID technology, do not let the advantage become a disadvantage

2 history

Speaking of NFC technology in the application of commodity security, observers would like to clarify a concept with everyone, that is, the difference between security and traceability. Often talked about the NFC tag in the application of goods, various articles will be "anti-counterfeiting traceability" together as a word, leading many friends think NFC tag is used to do this. In fact, this is a misunderstanding, anti-counterfeiting and traceability belong to two categories of things, some NFC tags can work with these two things together, but the reality is so far, this can be a real case of security labels is still very small, a large number NFC tag can only do traceability, if insisted that it can be counterfeit, that is ... Look, there are cattle in the sky fly ... This so-called anti-counterfeiting proficiency, technical origin of the observer has always felt that this is an insult to "security" Things. Why the emotion of the observer here is a little bit excited, this may come from the application of NFC technology in the process of product labeling.

We know that NFC technology is not born of a monkey in the stone. It is an evolution of RFID technology. RFID many years ago began to label the sweet big cake can not stop, the cost of course can not be compared with the bar code, but it has a bar code can never be an advantage, that is, an RFID tag can do the production line management, logistics Management, Asset Management, Traceability and Security. Alcohol in this area is the forefront of the application of Maotai and XX liquid.

There are many technical standards for RFID. Based on the carrier frequency, it can be divided into LF, HF and UHF, as well as the smaller 2.4G. In selecting technical standards, Maotai and XX liquid go two different ways, specifically, Maotai chose high-frequency RFID, and XX liquid selected UHF RFID. The introduction of RFID technology, enough to see the two famous wine in this regard, in the more obvious commodity at the same time, it does bring the benefits. With the development of technology, both found that the existing RFID technology deficiencies, upgrading is an inevitable thing.

The RFID used by two luxury winemakers can not meet the above-mentioned needs: product line management, logistics management, asset management, traceability and anti-counterfeiting. Even worse, perhaps the system provider Fudge, they are convinced and have been Advocacy They use RFID anti-counterfeiting technology, safe and reliable, can not be copied. Followed by some of the wine counterfeiting incident, we found that the RFID tag is not as magical in the publicity, the fake wine can actually pass the official RFID verification. All of discontent finally broke out, "RFID? Fuck off, U fucking bitch"

Fully understand the RFID technology, do not let the advantage become a disadvantage

Let's see together to what extent they use the RFID tag weak chicken. Maotai used the HF label based on the ISO / IEC15693 protocol standard. The features of this protocol are described here. The observers only say that there are three important ones:

Communication distance between UHF and HF ISO / IEC14443 between 20cm;

Communication baud rate is low, there is no encryption, random algorithm and instruction set;

Recently just joined the NFC forum, become NFC-V technology, need to carry a newer type of NFC controller chip phone to read, or need a dedicated reader;

Fully understand the RFID technology, do not let the advantage become a disadvantage

Therefore, I do not need to say the conclusion, in addition to tracing a source, other needs, either can not do is to do well. XX fluid used UHF RFID, according to the existing UHF technical standards and products, the observer directly concluded that the communication distance is very good, good production line, logistics, asset management and traceability, but there are three Disadvantages, can not be counterfeit, susceptible to passive read interference reading string and need a special reader.

Based on the above shortcomings of RFID, there is now a near-perfect NFC tag: dual-band standard. This is a tag with both UHF and HF technologies that share the EEPROM integrated inside the chip. So it brings together the advantages of both technologies and complements their respective deficiencies.

UHF channel: production line management, logistics management, asset management, traceability

HF Channel: Asset Management, Traceability, Security

Such a label can really be multiple management, full life-cycle management.

Fully understand the RFID technology, do not let the advantage become a disadvantage

3 current situation

Maotai aware of the issue of security, the use of a new generation of HF tags, because the chip is in a state of secrecy, observers can not see the relevant information, only based on limited information to make the following speculation. Based on the technology of ISO15693-2, the logic part of the chip joins the national secret algorithm and the true random number generator. The instruction set adds a private instruction set, and the two-way authentication flow and communication conforming to the "electronic tag chip specification adopting SM7 cipher algorithm" Encryption process. By using lightweight encryption algorithms and random number generators, great security is gained at a fraction of the cost. Observers assessed that under the current conditions, there is no cost-effective crack solution to effectively attack the product at the chip level.

Fully understand the RFID technology, do not let the advantage become a disadvantage

XX liquid released its latest generation NFC anti-counterfeiting system in March 2017 using a dual-frequency antenna, where the HF HF channel is used for anti-counterfeit, NFCForum-compliant T2Ts, eliminating the need for specialized

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