FAQ to RFID and NFC
Frequently asked questions and answers about the functionality of RFID and NFC systems
How does RFID work?
RFID (radio frequency identification) is the technical term for a system consisting of a transponder which stores data electronically and a separate reader device which is able to receive said data. In this way, for example, personal information and account data can be stored on bank cards and remotely interpreted by a reader device using electromagnetic waves – and some smart phones can act as readers.
How does NFC work?
NFC (near field communication) technology designates an international transmission standard for contactless data exchange across short distances via radio waves. For example, the exchange of data between a credit card and an automatic checkout system enables contactless payment without cash
Where is RFID used?
In addition to bank cards, personal ID cards, passports and driver’s licences, RFID data chips can also be found in customer and bonus cards, insurance cards and other ID cards. Thanks to the fast exchange of information possible, RFID is also frequently used for access control and time tracking, as well as in merchandise management systems and logistics.
How can I recognize cards with RFID or NFC coding?
The relevant symbols and signs on credit cards, etc. vary depending on the supplier. In individual cases, banks can offer reliable information as to which symbol is used for this purpose. On modern personal identity cards, the RFID chip is located in the upper right-hand corner, in passports inside the cover.
How do RFID blockers work?
Sleeves with RFID protection provide reliable radio wave blockage, so that the stored data cannot be read. The readout device is thus blocked from reading the radio signal.