A Trial Balloon to Ban Email?

[Nathan Neulinger]

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 at umr.edu
University of Missouri - Rolla         Phone: (573) 341-4841
Computing Services                       Fax: (573) 341-4216


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