Paperkey 1.0 released

David Shaw dshaw at
Fri Jan 23 00:58:27 CET 2009

On Thu, Jan 22, 2009 at 04:52:48PM -0600, Kevin Hilton wrote:
> Thanks for this release.  Reading the explanation on the website:
> got me thinking.  Is
> there an explanation or description of all the metadata that is
> contained within the secret key?

Yes.  See RFC 4880, sections 5.5.3 and 11.2.  What makes paperkey
possible is that in OpenPGP, a secret key is actually the same thing
as a public key with a few extra fields tacked on (the ones specified
in 5.5.3).

Another nice side effect of this is that you can transform any secret
key into a public key.  In fact, GPG will do this for you - try
importing a secret key that you don't already have a public key for.
GPG will import the secret key, and then create a public key for it


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