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Modern NFC technology is used for wireless data transmission, works on high-frequency communication within 10 cm aisles.
It is used by:
-in terminals for contactless payments;
-when transferring files between devices;
-in smart homes.
Story
On May 17, 1983, the RFID technology was patented, which is the predecessor of modern NFC, the patent owner is Charles Walton, after a while three corporations Sony, Nokia and Royal Philips Electronics in 2004 create an association called the NFC Forum. It is intended to develop and promote this area. In 2006, the Nokia 6131 entered the market, the first gadget equipped with an NFC chip.
How it works
Information is transmitted through an NFC chip, over high-frequency radio waves, Wi-Fi and Bluetooth work in a similar way. Data from NFC is transmitted at a frequency of 13.56 megahertz, if the distance between devices is up to 4 cm, then the transmission speed will reach 424 kbps. This is almost 4 times slower than Bluetooth, but more than enough for sharing pictures, music, and even more so for contactless payments.
NFC is used in active or passive mode. An active one requires a power source for each device, and for a passive one, one device with its own power source is enough.
power usage
With one connection, NFC consumes 40mA. For one hour, in sleep mode, it will consume from 3 to 5 mA, compared to Bluetooth Low Energy, this is three times less. In the energy-saving mode, the energy consumption does not rise more than three microamperes, it is useless to turn off the NFC function, since it will require less than 0.01% of the charge per day.
NFC payment methods
Many devices support NFC contactless payment; it is most convenient to pay with a phone or a fitness bracelet. To pay by phone, you need to install Google Pay or Apple Pay, depending on the operating system of the device. You need to go into the program, scan the card and enter the security code on the other side of the card, and after that, you can already pay.
For Mi Band bracelets, you need to install the Mi Fit application, add a new NFC-enabled bracelet to the application and tie a Mastercard bank card. Even an inexperienced user can easily perform such an operation. You can pay with NFC wherever there are terminals, even in the metro.
Security
If you lose your smartphone, there is no reason to worry about cards linked to the payment system. In the event that the lost phone is found, all data will be at least under the password of the device itself. No one will be able to pay for purchases, since the data is additionally protected with a fingerprint, no hacker can break such protection.
Google and Apple are ready to give about a million dollars for information about the vulnerability of security systems and will gladly hire a specialist who discovered the problem.