On 12/5/2008 4:08 AM, Eddy Nigg wrote [in part]:
> On 12/05/2008 08:58 AM, Ian G [also in part]:
> 
>  > When I lose a key, all the old encrypted email is no
>> longer readable ... which presumably happens when revocation happens as
>> well.
> 
> For your protection, yes.

That's contrary to the way OpenPGP works.  With OpenPGP, a revoked key
can no longer be used to encrypt or sign.  However, the private part of
a revoked key can still be used to decrypt files and messages that the
public part encrypted before revocation; and the public part of a
revoked key can still be used to verify a signature generated by the
private part before revocation.  That's one reason why revoked keys are
not removed from public key servers (the main reason being to let others
know about the revocation).

-- 
David E. Ross
<http://www.rossde.com/>

Go to Mozdev at <http://www.mozdev.org/> for quick access to
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