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How NFC work?
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>> NFC Tag :: How NFC works?

How NFC work?

    What is NFC(near field communication) really about and how does NFC work? Near field communication, is a short-ranged wireless communications standard that allows two devices to exchange data when in the proximity of each other. Yes, NFC is similar to Bluetooth technology if you will, allowing two devices to interact with each other. But NFC works only in very close proximity, up to 20cm (7.87 inches) in theory, although its actual optimal operating distance is somewhere around 4cm (1.57 inches) or less. On the other hand, Bluetooth can pair devices up to 50 meters apart.
    In order for NFC features to be available on smartphones and tablets, those mobile devices need to contain a NFC chip that would handle any NFC communications. Therefore, if your current Android handset or tablet does not have one such chip inside, it won’t be able to handle mobile payments and offer other NFC-based features.
    NFC is a technology built upon radio-frequency identification, or RFID, which allows a gadget to send radio waves to another gadget or to another RFID-enabled tag and trigger a certain action.
    Two of the advantages that NFC has over other wireless communications technologies are power efficiency, very important in mobile devices, and relative security, as third-party attacks on NFC devices would require the “hacker” to be in very close proximity of the target in order to access NFC-data exchanges. Chances are that, even if NFC is not 100% secure from third-party attacks, hackers won’t be able to get in between your mobile device and the other NFC device, since they’ll only be able to interact at around 4cm or less.

Post by Oprfid.com Jan,13th,2016
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        Just like Bluetooth and WiFi, and all manner of other wireless signals, NFC works on the principle of sending information over radio waves. Near Field Communication is another standard for wireless data transitions, meaning that there are specifications which devices have to adhere to in order to communicate with each other properly. The technology used in NFC is based on older RFID (Radio-frequency identification) ideas, which uses electromagnetic induction in order to transmit information.