UHF for example uses the 840-960 MHz range. There is a variety of RFID protocols working on other frequencies. Flipper Zero supports both their frequencies. In this article, we will be looking at the two most popular types of RFID tags that are used in access control systems. It is worth considering when you try to distinguish the type of tag you have. Two absolutely visually similar tags might be totally different inside. Quite often manufacturers use similar plastic cases for different types of RFID fobs operating on different frequencies. On the outside RFID tags can be quite different Judging by the visuals alone it's almost impossible to distinguish the frequency or protocol the tag operates on. On the outside RFID tags can be quite different: cards both fat or thin, key fobs, bracelets, coins, rings, or even stickers. It's worth mentioning, that a tag's antenna is tuned to a specific frequency, so the tag can only activate when it is inside a suitable electromagnetic field. The chip then turns on and begins communicating with the reader. As soon as it comes within range, the tag's antenna begins absorbing energy from the reader's EM field and the chip receives power. The chip inside is completely turned off until the tag is exposed to a reader's electromagnetic field. Most RFID tags are passive tags with no internal power source. How RFID Tags Work RFID chip turns on when it receives power from the reader's RF field You will see how you will be able to save your office, sports, home whatever RFID keys you have and we'll take a glimpse at what Flipper can read from a bank card. Here we will compare these two types of tags, take a look at the main protocols and learn to work with them using Flipper Zero - we will read, emulate, save and clone them. These tags are commonly used in contactless bank cards, to pay for public transport, and in high-security access control systems. They support encryption, authentication, and cryptography. High-Frequency tags (13.56 MHz) - have a lower effective range when compared with the low-frequency ones but have more complex protocols.Despite being insecure and dumb, they are still used in primitive access control systems: in building intercoms, offices, sports facilities, museums. Low-Frequency tags (125 kHz) - work at a higher range.The two main RFID tag types are high frequency and low frequency. It is quite common and you may see it in a lot of places: intercoms, bank cards, public transport passes, office passes, they are used to track domestic animals, for toll collection, etc. RFID is a contactless radio-tag technology.
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