How does NFC smartphone is and what it can be used
Technologies / / December 19, 2019
What is NFC
NFC stands for Near Field Communication, or literally, "near field communication". This technology is used for transmitting data between devices at a distance of 10 cm. Contact is maintained by the magnetic field.
NFC may operate in active and passive modes. For the first requires that both devaysa have their own power source, while the second one is enough. In the latter case one of the devices receives its operating power from the electromagnetic field of the other.
NFC-chip itself has a fairly compact size, which allows its use in smart phones, PC Speaker, tablets and other mobile gadgets.
What you can use NFC
Sharing data with other devices
Compared with the technology Bluetooth, NFC has a very high speed connections between devices installed. In this case, the speed of the transmission data in the active communication mode is quite low. That is why in the NFC smartphones are usually only used to transfer contacts, links, and notes, as well as the coordinates on a map.
When transferring large files, the technology is only used to connect the device and the contents sent via Bluetooth or Wi-Fi. This applies even to a simple transfer of video or documents through function "Send."
To know the exact location of the chip antenna can be in the instruction manual. However, in most cases, they are displayed on the back of the housing. Therefore smartphones when connected via NFC need to lean against each other back to back.
Scanning and programming of labels
The passive communication mode can be used for reading information from an NFC-programmable chips or so-called tags. Own power supply they do not, and activation of the electromagnetic field is derived from the device reader.
The main purpose of tags - to provide further information about the product or some event. Some retail chains have already NFC-tags replace bar codes. Leaning smartphone, the buyer can obtain detailed information about the composition, Shelf life and storage conditions.
Also labels are used for the automation of various actions on the smart phone - switching applications, change the sound profile, send messages and so on. For example, you can program a tag to start the navigator and attach it to the machine. Once you put it on your smartphone, the gadget will start automatically.
Programmable label through a special application on the smartphone, such as NFC Tools.
Price: Free
emulation card
Gadgets with NFC may be used to emulate a smart card used as a badge or key travel. However, with the arrival of Russian payment systems Android Pay, Apple Pay Samsung Pay and the main purpose of the NFC-chip in the smart phone has become an emulation of bank cards for contactless payments.
To pay for goods using NFC just enough to bring the smartphone to the terminal at the checkout. The main thing - pre-tied her bank card to the payment system available for your smartphone.
The greatest coverage of the device has Android Pay, since it, in contrast to similar services Apple and the Samsung, not tuned for a particular device manufacturer. However, any of these payment systems you can use without fear and risk.
None of them in the time of payment does not transmit the card number on the terminal itself. Instead, the so-called token - digital encrypted identifier is generated automatically when the card is activated. That it will be read as the main props.
How NFC safe
NFC devices can simultaneously receive and transmit data, allowing them to detect the contradiction, if the received signal does not correspond to the transmitted.
The risk of interception of your data is very small, especially considering the minimum radius of action of the technology. The same Bluetooth, operating within tens of meters, which is more vulnerable to outside interference.
With regard to this, and payment details: Token not allow attackers generated for contactless payment access your map. And the fact of the interception of the encrypted identifier looks unrealistic.
In addition, when contactless payment to be confirmed by reading the fingerprint, password, or face scan. Without all this, the purchase does not take place. So, even if your smartphone gets stolen, use it as a payment instrument, no one can.
Which smartphones support NFC
Once enabled this technology has only expensive flagships, but now to buy a smartphone with NFC can be priced at less than 10 000 rubles. In any case, this applies to devices on Android. Among the most affordable Nokia may be noted 3, Samsung Galaxy J5, Motorola Moto G5s.
The ecosystem of the cheapest Apple smartphone with support for Apple is the Pay iPhone SE, which is now worth slightly less than 20 000 rubles. All the more expensive models, starting with the iPhone 6, the NFC-chip also possess.
If you do not know whether there is in your NFC Android-smartphone, you can check it out by searching for the settings. Normally associated with the technology functions available in the connections or wireless networks. Also NFC icon should appear in the list of icons in the Quick Launch curtain above.
see also🧐📲
- How to use Google Pay and whether it is safe
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