document: Spam attacks : p2p to the rescue We propose a decentralized privacy-preserving approach to spam filtering . Our solution exploits robust digests to identify messages that are a slight variation of one another and a peer-to-peer architecture between mail servers to collaboratively share knowledge about spam .
doc_bio_tags: O O O O O O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O