Spam Busting, Peer-to-Peer Style
by Schuyler Erle
Related link: http://razor.sourceforge.net
Using nothing fancier than some cryptographically-secure hashing, and a distributed database or two, Vipul's Razor might just be the new millenium's best hope in the war on spam.
From the project homepage: "Vipul's Razor is a distributed, collaborative, spam detection and filtering network that exploits the broadcast characteristic of spam distribution to limit its propagation. The primary focus of the system is to identify and disable an email spam before its injection and processing is complete."