In recent years transmission technologies have developed and are largely established on the contact-free transmission of personal data via RFID (Radio frequency identification) or NFC (Near-field communication). Data is transmitted and stored to a transponder, which can be read using a reader. This process is used to read and verify various data, i.e.
ID cards
Entrance tickets or payment cards, used for access to public transport, ski resorts, leisure events, or similar
Credit or debit cards
All data stored on transponders is encrypted, but these codes can be decrypted, manipulated or simply made unreadable by means of electro-magnetic rays.