Nitrokey factory reset

[ksp1968]

Ok, I found this.

[solved] Nitrokey Pro - RHEL / CentOS 7 - Key generation failed: Card error

I’ve been trying to run the Nirokey Pro under CentOS 7 and gnupg for days now. I can access the key with nitrokey-app without a problem. I can address the stick without any problems with the nitrokey-app and so e.g. store my name and/or change the PIN. I can also use the command gpg --change-pin to change the PIn numbers. But as soon as I try to generate a PGP key on the smartcard I get the error message “Key generation failed: Card error”. It doesn’t matter if I use the key length 2048 or 40…

Insert or reinsert your NK Pro 2 into your USB port. Quit nitrokey-app if started.
You have to find and download the file nitrokey-reset.txt.
Then open a terminal and perform the command gpg-connect-agent < nitrokey-reset.txt
I hope this helps.