http://dds6qkxpeiqvogt4y2fd7vtsxq6pvokekb2h4la7jd4iwl4ljuawu5qd.onion/wiki/Essential_Host_Security
This does not prohibit safe use of the Tor network, because IPv6 is not (yet) configured by default, see: The Tor IPv6 Roadmap . For greater security, on-line activities should be conducted in locations that are new, distant, random, and non-circular.