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Home / Glossary / RFID
Glossary · Device

RFID

Radio Frequency Identifier

In plain language

Tiny tags that can be read from a short distance, used for badges, stock and tolls.

The metaphor

Like a barcode that can be read without line of sight.

Going deeper

How it works

  • Tags contain a small chip and an antenna.
  • A reader powers and reads them.
  • Used in access badges and inventory.
  • Cheap badges can sometimes be copied.
In practice
  • An office uses badges for the front door.
  • A shop tags stock.
  • A gym tracks member entry.

A question owners ask

Can someone copy my badge?

Older, cheaper types can be copied, and newer ones are much harder.

Related terms
BIOSBasic Input/Output SystemCCTVClosed-circuit TelevisionCSUChannel Service UnitEndpointESNElectronic Serial NumberFirmwareFPGAField Programmable Gate ArrayGPSGlobal Positioning System

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