USB communication
=================

  * No command chaining, but extended APDU and extended Lc and Le
  * dwMaxCCIDMessageLength: 64


OpenPGP card protocol implementation
====================================

* No clear password(s)

PW1

* Support of Resetting code


KEY
=======

KEYPTR
         ----> [   P   ][   Q   ][       N        ]
               <---encrypted----><---  plain  ---->

key_addr                       4-byte
additional_data_encrypted      16-byte
dek_encrypted_by_keystring_pw1 16-byte
dek_encrypted_by_keystring_rc  16-byte
dek_encrypted_by_keystring_pw3 16-byte

... decrypted to

[   P   ][   Q   ]
check   4-byte
random  4-byte
magic[] 8-byte