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Re: hashcash spam prevention & firewalls
Adam Back <[email protected]>:
> How about this alternative which achieves the same functionality and
> removes the juicy supeona target:
> Turn on hashash database for all mails. That means hashcash gets put
> in the database to prevent double spending. ....
> So now when you reply to a message, on it's way out via the mail hub,
> you remove that hashcash token from the double spending database.
> This means that the sender can cache sent hashcash tokens, and re-use
> them when after he gets a reply.
Doesn't this invite the spammer to Bcc an accomplice with the
target ISP ? The accomplice replies; thereby freeing the coin
for reuse.
> I am told by one subscriber to look at TIS firewall toolkits imap
> program.
You may have meant "smap".
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