[13257] in cryptography@c2.net mail archive
Re: A Trial Balloon to Ban Email?
daemon@ATHENA.MIT.EDU (Nathan Neulinger)
Tue May 13 09:04:05 2003
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
From: Nathan Neulinger <nneul@umr.edu>
To: Paul Walker <paul@black-sun.demon.co.uk>
Cc: bear <bear@sonic.net>, cypherpunks@lne.com,
cryptography@metzdowd.com
In-Reply-To: <018801c31807$1f991670$0b01a8c0@whitestar>
Date: 13 May 2003 07:23:23 -0500
On Sun, 2003-05-11 at 16:05, Paul Walker wrote:
> > I submit that if Joe Lunchbox is not spamming, he is unlikely to
> > need to change his habits regarding having his machine available
>
> Mostly unrelated to this, but something's just occurred to me. Probably I'm
> being really stupid, but ... for the receiving MTA to know that the problem
> has been processed properly, it would have to know the answer. How does it
> know what the answer should be?
I believe the usual approach to this is to have it be a asymmetrictry
hard problem - i.e. factor some primes to do the work (hard), multiply
them to validate answer (easy).
-- Nathan
------------------------------------------------------------
Nathan Neulinger EMail: nneul@umr.edu
University of Missouri - Rolla Phone: (573) 341-4841
Computing Services Fax: (573) 341-4216
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