[13316] in cryptography@c2.net mail archive
Re: Payments as an answer to spam
daemon@ATHENA.MIT.EDU (Derek Atkins)
Sat May 17 18:51:23 2003
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
To: "Arnold G. Reinhold" <reinhold@world.std.com>
Cc: iang@systemics.com, cryptography@metzdowd.com
From: Derek Atkins <derek@ihtfp.com>
Date: 17 May 2003 13:26:45 -0400
In-Reply-To: <a05200f1ebae778e26862@[192.168.0.2]>
"Arnold G. Reinhold" <reinhold@world.std.com> writes:
> If hashcash proof of work is combined with an easy to use whitelist,
> the hash stamp is only needed when communicating with strangers. For
That's not sufficient. Spammers regularly forge email addresses.
I've received spam apparently from people I know, but it's clearly not
from them. So, just using white lists on the "From: " address is not
sufficient. You still need some content filtering (either via a coin,
a signature, or something easily-verified).
-derek
--
Derek Atkins
Computer and Internet Security Consultant
derek@ihtfp.com www.ihtfp.com
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