If you bought a business card wallet or purse, on the tag which (or on him) said that there is a RFID blocking feature, you will probably wonder what is this all, for RFID and so will your credit and debit cards safe with this thing. To the question, what is RFID, and how it works we decided to answer in this article, and if after reading it you have any more questions, please ask them in the comments.
What is RFID?
First let us deal with the simplest question. RFID is a rather clumsy acronym for Radio Frequency Identification, which translates into a great and mighty radio frequency identification. The full title is the key to understanding how this technology works. RFID uses radio waves to send information at a very small and simple device. While the articles and theories about systems such as RFID, was first published in 1940-ies, the first real practical applications and devices, RFID emerged in the mid 1970-ies. In a sense, RFID is a simple version of NFC (Near Field Communication), which many Android smartphones are used for digital payment systems like Samsung Pay , and Android Pay.
Why use RFID?
RFID devices are used everywhere. The RFID chips are inside the ID badges for added security and to ensure access to restricted areas. RFID tags are placed on such items as clothing and other goods intended for retail sale, not only to provide greater security, but also for more effective tracking of their delivery to the store. More and more credit and debit cards have built in RFID chips to offer better and more secure system of contactless payment using special readers. Labels supplied with the Luggage at the airport, which makes it easier to track. And even Pets are now kiperousa with RFID tags to be identified if they are lost, and also in the labels contains information on veterinary examination.
How to operate the RFID device?
Actually there are two different types of RFID devices or tags. A more common chip used in credit and debit cards is “Passive RFID”. The tag uses this technology, has no internal power source. Instead, it receives power, when touches another device such as a RFID reader chips. The reader sends radio waves to a passive RFID tag, activating it, and also reads information from the tags in the form of identification number.
Another type of RFID tag uses a technology called “Active RFID”. These tags have a small internal battery which serves their own power source. So they can send out their own radio waves to transmit any information encoded in the tag, the appropriate reader. Again, it’s very similar to how NFC works.
Passive RFID tags have a limited range; theoretically they can be used at a distance of about 6 meters from the reader. Active RFID tags have a much greater range up to 30 meters and more.
Is the use of RFID safe and reliable?
Radio waves, which emanate from RFID tags or RFID readers are located in the low frequency range. In other words, there are absolutely no health risks when using or storing the devices with RFID chips. However, someone can create a device that could read information embedded in the RFID tag, such as that located on credit and debit cards from a short distance. Cases of this actually happening are pretty rare, but precaution never hurts and that is why business card holder with RFID protection in our day have become quite common.
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