Tor currently transports data over encrypted TLS tunnels between nodes, in turn carried by TCP.
The Tor 0.2.2 release series is dedicated to the memory of Andreas
Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
Tor 0.2.2.15-alpha fixes a big bug in hidden service availability, fixes a variety of other bugs that were preventing performance experiments from moving forward, fixes several bothersome memory le
Tor 0.2.2.14-alpha greatly improves client-side handling of circuit build
timeouts, which are used to estimate speed and improve performance. We
Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
handle and vote on descriptors. It was causing relays to drop out of
Here's what the Tor Project accomplished in September 2009.
On September 21st, we released Tor version 0.2.2.2-alpha.