Separate OpenPGP cards for master key and sub-keys

Pete Stephenson pete at
Tue Jun 4 02:03:51 CEST 2013

On Mon, Jun 3, 2013 at 11:10 AM, Mustrum <Mustrum at> wrote:
> I already moved my subkeys to one cryptostick.
> When i tried to move the primary key (4096 RSA) to another stick i got:
>>gpg> keytocard
>>Really move the primary key? (y/N) y
>>Signature key ....: [none]
>>Encryption key....: [none]
>>Authentication key: [none]
>>Please select where to store the key:
>>Your selection?
> Note that there is NO valid choice.
> Any ideas ?
> I'm using gpg 2.0.20

What version of the Crypto Stick are you using? I've successfully
moved 4096-bit RSA primary keys to the OpenPGP smartcard and 2048-bit
RSA subkeys to a Crypto Stick v1.2, but I would expect the Crypto
Stick would also support 4096-bit keys. I don't know if early versions
wouldn't support keys of that length.

Pete Stephenson

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