“Tor metrics are the ammunition that lets Tor and other security advocates argue for a more private and secure Internet from a position of data, rather than just dogma or perspective.”
— Bruce Schneier (June 1, 2016)
Country and ISP diversity are approximated by resolving IP addresses to a country code an an autonomous system. We process the capabilities and properties relays and bridges reported to directory authorities.
This image shows the churn rate of the Tor network by relay flag in a given month. The churn rate, a value in the interval [0,1], captures the rate of relays joining and leaving the network from one consensus to the next (that is, within one hour). The complete image gallery can be found on Philipp Winter's homepage.
This material is supported in part by the National Science Foundation under Grant No. CNS-0959138. Any opinions, finding, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. "Tor" and the "Onion Logo" are registered trademarks of The Tor Project, Inc.. Data on this site is freely available under a CC0 no copyright declaration: To the extent possible under law, the Tor Project has waived all copyright and related or neighboring rights in the data. Graphs are licensed under a Creative Commons Attribution 3.0 United States License.