Subject: Re: recover private key

Avi at
Wed Jan 14 00:34:34 CET 2009

Yes, Robert, that is possible. However, IIRC, signatures come with a
time stamp. In the case I am envisioning, the quotER is taking it from
somwhere, and the quotEE can show the prior, complete post.

Yes, this does not prevent someone from pre-creating two different
messages, but someone resorting to that level of duplicity is both
uncommon and will likely have other prevaricatory methods as well.


On 1/13/09, Robert J. Hansen <rjh at> wrote:
> Avi wrote:
>> For example, given the possibility of a piece of an e-mail being
>> quoted out of context, signing my messages allows me to
>> demonstrate the totality of what I did write at the time I wrote
>> it, so I have a recourse to show the entire post and its
>> context. The same would apply for text documents, etc.
> Yes and no.  If I ask "Avi, did you really say 'I liked Yasser
> Arafat'?'", you might present me with this message:
> 	"With respect to the Munich Massacre -- I don't know
> 	 who was ultimately responsible for it, but I always
> 	 liked Yasser Arafat as the chief culprit."
> ... But unbeknownst to me, you /did/ actually say "I liked Yasser
> Arafat.  I liked him quite a bit, really.  I often had him over for tea
> and scones and we would talk about our families."
> When confronted with the quote "I like Yasser Arafat", you wanted to be
> able to deny saying it.  So you wrote up an innocuous text message
> involving the Munich Massacre, reset your computer clock back, signed
> it, and then presented me with the doctored message as proof of what you
> _really_ said at that point in time.
> You cannot use signatures to put excerpts in context, not in the general
> case.  The timestamp problem is a killer.
> If the person presenting you with a quote also includes the signature of
> the message they're quoting, though, then yes, this becomes possible.
> But if they're excerpting you, odds are good they don't have your signature.

Sent from my mobile device


pub 1024D/785EA229 3/6/2007 Avi (Wikipedia-related) <aviwiki at>
    Primary key fingerprint:  D233 20E7 0697 C3BC 4445 7D45 CBA0 3F46 785E A229

More information about the Gnupg-users mailing list