This article once again addresses the issue of radio frequency identification technology, and addresses one of the most common standards in USA today.

The RFID theme, as we have said, is limitless. Today we will focus on a detailed review of another standard that is widely used in everyday life - the Philips Semiconductor Mifare® standard. Millions of people are already using this standard in NY...
Technical aspects
Mifare® is an RFID object identification system with a reading and writing distance of up to 10 cm and conforming to ISO / IEC 14443, type A. It has an anticollision algorithm and allows simultaneous work with several cards in the reader field. Mifare® microchips are convenient for use in cards and various forms of transponders, which can be made in the form of key chains, coins, bracelets, etc. Consideration of the Mifare® architecture will start with the most common modification - Mifare® Standard. Map data structure The table shows the internal data structure of the map (sectors 2 through 13 are not shown - they are identical to the others).

In the last post, an overview article was published concerning proximity technology and its use in everyday life. Today we will continue this topic, dedicating the main part of the conversation to the international system of product identification GTAG.
Terminology
In the last article, we mainly used the term proximity. In a broader sense and given the many new applications, the term RFID - Radio Frequency IDentification is becoming more and more common, which literally translates as "radio frequency identification." This term is more correct, as with the increase in the reading range of contactless tags, the meaning of the word proximity (close) begins to lose its original meaning.
The term GTAG is completely familiar only to specialists. It is derived from the phrase Global TAG, which can be translated as a “global label.” Why global? Because specialists of the whole world work on this standard, and this standard is proposed not as European or American, but as a global one. The main provisions of the standard have already been developed, the element base has been developed and the implementation of this technology has begun.

Things and technologies surrounding us have been changing very quickly lately, producing real revolutions in the way of life, although they usually pass “without noise and dust”. Not everyone thinks about it, taking everything as a natural change of day and night. But if you think about it, it’s very difficult to imagine today's world without these things. The Internet, mobile communications, GPS systems, handheld computers, digital photography and video shooting are only a small part of the iceberg. Today we are experiencing another such revolution, whose name is RFID.
... almost everyone knows
Yes, the phrase “contactless smart card” has been familiar to Moscow students and schoolchildren for several years, who use them extensively, for example, as travel tickets in the subway, and retirees in several districts of Moscow know the same card from a pilot project of a Muscovite’s social card. Many of those who use the Moscow and St. Petersburg metro on a daily basis also have such a map, as many of the municipal employees have it.
This card has a proper name - Mifare®. This name is clearly associated today with Philips, although it was developed by Micron, which was later purchased by Philips and became one of its divisions. We will talk about this card, its device and capabilities later, but for now let us recall once again the essence of the radio frequency identification technology (Radio Frequency IDentification) in order to understand its potential possibilities. Those who are already familiar with the basic principles can skip this section.