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RFID

  • Can not be read by mobile devices
  • 10-15m reading distance
  • Impossible to duplicate

RFID tags

There are two classes of RFID tags: passive and active. Passive tags collect energy from a nearby RFID reader’s interrogating radio waves. Active tags have a local power source (such as a battery) and may operate hundreds of meters from the RFID reader. Unlike a barcode, RFID tag don’t need to be within the field of view of the reader, so it may be embedded in any part of the tracked object.

NFC

  • Can be read by mobile devices
  • 5 cm reading distance
  • Impossible to duplicate

NFC tags

These tags could be identified by NFC reader built in to the smartphone’s hardware. NFC tags can store a wide range of information, from text to links to the apps in digital stores. This is fast and efficient way to transfer information. NFC tags are passive devices, which means that they operate without their own power supply and rely on active devices that enter the coverage area before it is activated. NFC has built-in data protection.

QR code

  • Can be read by mobile devices
  • Can be easily duplicated

QR code

A QR code is defined by a sensor or a camera as a two-dimensional image. Three squares in the corners of the image and smaller synchronization squares throughout the code allow you to normalize the image size and orientation, as well as the angle at which the sensor is located to the image surface. Points are converted to binary numbers with checksum checks. Therefore, QR-codes require optical visibility by the smartphone’s camera for its identification.