[148460] in cryptography@c2.net mail archive
Re: [Cryptography] Size of the PGP userbase?
daemon@ATHENA.MIT.EDU (Ralph Holz)
Sat Dec 14 16:06:09 2013
X-Original-To: cryptography@metzdowd.com
Date: Sat, 14 Dec 2013 12:11:35 +0100
From: Ralph Holz <ralph-cryptometzger@ralphholz.de>
To: ianG <iang@iang.org>, Jon Callas <jon@callas.org>
In-Reply-To: <52AC010C.3030606@iang.org>
Cc: Cryptography Mailing List <cryptography@metzdowd.com>
Errors-To: cryptography-bounces+crypto.discuss=bloom-picayune.mit.edu@metzdowd.com
Hi,
> Aha! So you could measure the ratio of PGP to S/MIME usage by message
> from that. You could also count the number of distinct users for each
> population.
Very hard to get unless you have a tap into a major MX. Much SMTP
traffic is SSL-secured today (which is a good thing), and thus the
standard monitoring setups, where the monitors sits near the border
router, cannot determine if there is a signature inside the traffic.
The significance of doing local measurements is very disputable.
Ralph
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