RFID DesFire (MFR522 / MIFARE )

Can any one point me to examples of using Desfire with the MFR522 RFID module?

In particular MIFARE DESFire EV2.

I have been playing with classic but i know there are security issues and weould like to know a bit more about the security side of them .

I read a few posts about a desfire library, but seems very little info about.

Cheers