Access control systems (ACS) today are an integral part of the security systems of almost any object - from a small office to a large enterprise or military facility. In today's troubled world, this is not just a tribute to fashion, but a real opportunity to reduce the level of threat of intrusion by outsiders on an object. After all, the consequences of such an infiltration can sometimes be catastrophic, not only for a specific object, but also for the whole world, if we are talking about, for example, a military base or a nuclear power plant ...
Yes, the words in the title are not a reservation - the security of any strategic object is not only its object, security, but also ours. If sabotage occurs at a large chemical enterprise several kilometers away from your home, the consequences can be very sad ... That is why the issue of protecting such an important component of security systems as access control systems for such facilities is not a private affair of the enterprise director or military commander parts. This is a nationwide task, no matter how pathetic it sounds. Although we will talk about a very small component of the access control system - about proximity identifiers.

The magnetic tape on the back of your credit card begins to give up its white unconditional position in the market to the integrated radio chips. RFID-technology can dramatically change the usual method of payment that consumers use when buying goods or services. At least, supporters of the new technology hope so.
Contactless payments using a chip with built-in radio frequency identification (RFID) technology allow credit card holders to pay for purchases simply by holding a card two to five centimeters from the card reader. You no longer need to carry the card through the reader, there is no need to give it to the store employees, in other words, no more contacts of your credit card with unauthorized people.
If you’ve ever ordered food from Arby’s, drank morning coffee at 7-Eleven, or went to the cinema in Cinemark, you’ve probably already seen or even used that very contactless card reader. However, if you do not live in New York, Connecticut, Denver, Atlanta or in other places where American Express, Bank of America, Chase, Citibank, Key Bank, Wells Fargo and other issuing companies have conducted pilot programs for the implementation of contactless payments , you probably don't have a contactless card yet. In fact, only 7 million of the total number of Morgan Chase plastic card holders (90 million) use Blink cards (banking version of contactless payments).

Imagine a future in which not only people, but also things can communicate and exchange information. And this is not science fiction. The development of communications has led to the fact that today almost everything is connected to a single telecommunications infrastructure. We can no longer live without communication, just as we cannot exist without oil and electricity.
Translation difficulties
It is not the first year for linguists to argue about how to translate the beautiful ubiquitous society into “great and mighty” beautiful Americanism. This is a society in which, according to experts, you and I will soon have to live, they call it “omnipresent”, then “open”, or simply “ubiquitous”.
In fact, the word "ubiquitous" is not news in the field of IT. The term "ubiquitous computing" (literally - ubiquitous computing) was proposed as early as 1991 by Mark Weiser, the former chief scientist at the Xerox research center. There was a lot of talk about “total computing”, but until recently they didn’t really believe in the possibility of implementing this idea.
With the help of ITU [http://www.itu.int/ubiquitous/], who launched the Ubiquitous Network Societies project in late 2004, the minds of experts were captured by the idea of creating a world in which information technologies fit into everyday life . The day is not far off when using miniature radio transmitters, IP addresses or hyperlinks you can “see” almost any object (from remote controls to disposable razors) and manage it.
Continuous development of communication implies a constant increase in the number of users, operators, services, communication channels and types of information transmitted. As a result, bandwidth, speed of information exchange, traffic volume and network usage time will also increase. We can say that we are building a “On Line” community. Or the fact that in the near science literature recently began to be called "Ubiquitous Society".
The world is made up of bricks.