NFC – Definition and How It Works

NFC stands for Near Field Communication and is a short-range wireless technology for contactless data transmission over a distance of just a few centimeters. NFC technology is used for contactless payments, digital access cards, and smartphone access. Unlike other wireless technologies, NFC requires deliberate proximity to the reader — making the transmission particularly secure.

1. How Does NFC Work?

NFC uses electromagnetic induction at a frequency of 13.56 MHz. An NFC-capable device — such as a smartphone or an NFC card — communicates with a reader at a distance of just a few centimeters. A unique ID or data record is transmitted in the process. The NFC chip built into the device requires no power source of its own when operated passively. A practical example: you hold your smartphone against the reader on a locker — it opens automatically without needing to launch an app.

2. NFC vs. RFID – Key Differences

NFC and RFID are based on the same physical principle but differ in range and application. NFC works at a maximum distance of about 10 centimeters, while RFID can reach several meters depending on frequency. NFC is built into smartphones and widely used in the consumer space — contactless payments, ticketing, and NFC smartphone access are typical applications. RFID, on the other hand, relies on dedicated cards and transponders and dominates in B2B environments: access control, lockers, and logistics. If you want to dive deeper into the technology more relevant for access systems, the glossary entry on RFID provides a detailed explanation.

TIKI SHARE supports NFC as an access medium alongside RFID, app, QR code, PIN, and Bluetooth. Which medium is used depends on your specific use case.

3. Related Terms in the Glossary

• RFID
• Transponder