Error with encrypting: unusable public key

[David Shaw]

On Fri, Mar 02, 2007 at 11:05:48AM +0100, Laurent Jumet wrote:
> 
> Hello Olaf !
> 
> Olaf Gellert <olaf.gellert at intrusion-lab.net> wrote:
> 
> >> pub  2048R/CC21E10F  created: 2006-11-21  expires: never       usage: SC
> >>
> >> This is the information given in --edit-key. And the usage
> >> is the solution for your problem.
> >> It has *no* capability to encrypt data.
> 
> > Thanx, I missed that. So this is one of the "sign only"
> > keys and to enable encryption, one would add an encryption
> > only subkey?
> 
>     Not on that one, it's a RSA key.

It's okay - this is the new sort (i.e. OpenPGP or V4) of RSA key.  You
can add subkeys and do anything you'd do with any other OpenPGP key.
Only the old PGP 2.x (V3) RSA keys cannot carry subkeys.

David