For DESFire card:
- Need one reader to support it;
Write the client application for it; (But the command are not popular known by developers)
The price of DESFire card is about $2.5 per piece.
- Here are more reader can support it;
If the function is same as DESFire, the JCOP 10 card is enough to use;
That is only one thing to do: write the applet;
And write the client application;