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    I realy tried, but maybee my question wasn't clear enough. I have no Problem in putting keys onto the Nitrokey. It is Step4 that I can't follow. "4. use key file on the Nitrokey to encrypted\decrypt as normal" So how do I do that? With a key file the cryptsetup command looks like this: cryptsetup luksOpen --key-file luks-key.txt /dev/loop0 container1 But there is no such thing like: cryptsetup luksOpen --smart-card key-slot1 /dev/loop0 container1 Commented Jan 26, 2018 at 15:48
  • @soulflyman Ok, I see. There are instructions on how to do this within the Nitrokey documentation. See my edit above. Commented Jan 26, 2018 at 17:21
  • I understand the term "key file" in this discussion is inspired by TrueCrypt/VeraCrypt where it describes a file containing a symmetric secret to decrypt an encrypted volume. However, GnuPG's keytocard command can be used to import RSA and ECC keys to the Nitrokey device. Using "key file" in conjunction with GnuPG's "keytocard" is misleading. Commented Jan 29, 2018 at 19:35
  • They are all keys in files. You can put all sorts of key files on a Nitrokey. Commented Jan 29, 2018 at 21:04