Tor v0.2.4.19

[thylacine]

Tor v0.2.4.19 (Windows)

https://www.torproject.org/dist/win32/tor-0.2.4.19-win32.exe

Changes in version 0.2.4.19 - 2013-12-11

The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz

(1986-2013). Aaron worked on diverse projects including helping to guide

Creative Commons, playing a key role in stopping SOPA/PIPA, bringing

transparency to the U.S government's PACER documents, and contributing

design and development for Tor and Tor2Web. Aaron was one of the latest

martyrs in our collective fight for civil liberties and human rights,

and his death is all the more painful because he was one of us.

Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features

a new circuit handshake and link encryption that use ECC to provide

better security and efficiency; makes relays better manage circuit

creation requests; uses "directory guards" to reduce client enumeration

risks; makes bridges collect and report statistics about the pluggable

transports they support; cleans up and improves our geoip database;

gets much closer to IPv6 support for clients, bridges, and relays; makes

directory authorities use measured bandwidths rather than advertised

ones when computing flags and thresholds; disables client-side DNS

caching to reduce tracking risks; and fixes a big bug in bridge

reachability testing. This release introduces two new design

abstractions in the code: a new "channel" abstraction between circuits

and or_connections to allow for implementing alternate relay-to-relay

transports, and a new "circuitmux" abstraction storing the queue of

circuits for a channel. The release also includes many stability,

security, and privacy fixes.