NXP MIFARE DESFire EV1 rfid cards are widely used as follows:
PVC 13.56MHz NXP MIFARE DESFire EV1 rfid card
General description
MIFARE DESFire EV1 is based on open global standards for both air interface and cryptographic methods. It is compliant to all 4 levels of ISO/IEC 14443A and uses optional ISO/IEC 7816-4 commands.
Advanced public transportation schema
Highly secure access management
Closed-loop e-payment scheme
Event ticketing
Government applications