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Date: 2004-05-03 10:41:55Spam filtering Computer-mediated communication Email spam Anti-spam techniques Hashcash Spam Cost-based anti-spam systems Email authentication Spamming Internet Computing | “Proof-of-Work” Proves Not to Work Ben Laurie1 and Richard Clayton2 1Add to Reading ListSource URL: www.cl.cam.ac.ukDownload Document from Source WebsiteFile Size: 106,18 KBShare Document on Facebook |