Re: [Asrg] 3. Proof-of-work analysis

[Seth Breidbart <sethb at panix.com>]

Richard Clayton <richard at highwayman.com> wrote:

> 60 seconds implies that you limit people to 1440 emails per day. If
> you look again at the paper you will see that at this level the
> spammers who use zombies would be restricted to only about 5% of
> current activity (ie the solution would perceptually be no better
> than filtering)

But it would be independent of filtering, so together they'd eliminate
99.75% of spam (assuming your statement of 95% effectiveness each).

> or alternatively (if you think spammers will purchase kit to do the
> proof- of-work sums "legitimately") you are forcing the price of
> spam up to around 0.1 cents/email -- which is not sufficient to
> remove a lot of topics from our mailboxes.

That's a several order of magnitude increase in the price of spam so
yes, I do think it would remove a lot of spam from my mailbox.

Seth

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