On Sat, 12 Feb 2005 02:48:56 +0100, Bernhard Kuemel said: > If hashcash (http://www.hashcash.org/) gets integrated in our mail > systems we no longer need to hide or obfuscate our email addresses.
And I overlooked the most fatal flaw in hashcash: Hashcash really sucks if you're a mail server admin who has to crank 50,000 hash cashes a day at 5 CPU seconds a pop because people forgot to whitelist your server. Hashcash isn't even a tiny speed bump if you're a spammer and have 50,000 zombies - each one only takes a 5 second hiccup and continues spamming....
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