Pinguin-geek writes "Researchers at the McCormick School of social contraception and Applied Science at Northwestern health center have identified a new 'guilt-by-association' threat to privacy in peer-to-peer (P2P) systems that would enable an eavesdropper to accurately classify groups of users with similar computerize behavior. While many have pointed out that the data exchanged over these force can reveal personals and much more notice about users, the researchers shows that only the patterns of network — not the data itself — is sufficient to create a potent threat to user privacy. To thwart this threat, they have released SwarmScreen, a publicly available, open source dos that restores privacy by masking a user's real boot up exertion in such a manner as to disrupt classification."

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