Back signatures (was Re: [Announce] First release candidate for 1.4.3 available)

[David Shaw]

On Fri, Feb 17, 2006 at 04:18:17PM +0100, Malte Gell wrote:
> On Friday 17 February 2006 04:44, David Shaw wrote:
> 
> >     * Added support for signing subkey "back signatures".  Requiring
> >       back signatures to be present is currently off by default, but
> >       will be changed to on by default in the future, once more keys
> >       contain the back signature.  A new "backsign" command in the
> >       --edit-key menu can be used to update signing subkeys with back
> >       signatures.
> 
> Is the backsign command of 1.4.3rc1 stable enough to provide existing 
> keys with a back signature?

Yes.

> Are there any PGP implementations that have problems with keys
> containing such a signature?

I don't know of one.  Any PGP program that doesn't ignore unknown
noncritical signature subpackets would be pretty broken.

David