Talking about Cryptodevices... which one?

[Felix E. Klee]

On Tue, Jan 27, 2015 at 6:14 PM, Andreas Schwier
<andreas.schwier.ml at cardcontact.de> wrote:
> The encryption on the card is unrelated to the PIN.

So the private key is encrypted with an AES key that is also stored on
the card? Then why encrypt the private key at all? Against what attack
does encryption of the private key on the card protect?