What is the difference between NFC and RFID?
RFID (Radio Frequency Identification) is a broad technology category covering systems that use radio waves to identify and track objects. NFC is a specific subset of RFID that operates at 13.56 MHz, at very close range (under 4 cm), and supports two-way communication between devices.
RFID: the broad category
RFID systems consist of a reader and a tag. The reader emits radio waves; the tag absorbs them and transmits back an identifier. RFID tags are used in retail inventory, supply chain tracking, animal microchips, and access control badges. RFID frequencies range from low (125 kHz, used in older keycards) to high (13.56 MHz, used in modern contactless systems) to ultra-high (900 MHz, used in retail inventory).
NFC: the specific short-range standard
NFC is standardized at 13.56 MHz and limited to under 4 cm by design. The short range isn't a limitation — it's a feature. It prevents unintended reads and makes it practical for initiated interactions (tap to pay, tap to share). NFC also supports peer-to-peer mode, where two NFC-enabled devices can exchange data in both directions, which RFID generally doesn't do.
Can RFID readers read NFC tags?
If the reader operates at 13.56 MHz, it may be able to read NFC tags, depending on the protocol. But consumer NFC tags are specifically designed for NFC-enabled smartphones.
Is NFC more secure than RFID?
Short range is an inherent security benefit — someone needs to be within 4 cm to read an NFC tag, making drive-by skimming very difficult.
Do NFC business cards use the same tags as NFC payment?
They use the same 13.56 MHz frequency and NFC forum standards, but payment cards use additional security layers (ISO 14443 with encryption) that basic business card tags don't have or need.