Something is rotten in the state of Tor: Swedish researchers have found at least 22 corrupted exit nodes that were tampering with encrypted traffic leaving the supposedly private Tor network. While the corrupted nodes were able to touch only a small amount of Tor traffic, theyre evidence of what security experts have long feared: that criminals or spies could exist among the volunteers who operate Tors network and thus undermine Tors implicit mutual trust. MORE: What is TOR?