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SUMMARY:Improving Tor using a TCP-over-DTLS Tunnel - Joel Reardon\, Univer
 sity of Waterloo
DTSTART:20081104T161500Z
DTEND:20081104T174500Z
UID:TALK14822@talks.cam.ac.uk
CONTACT:Andrew Lewis
DESCRIPTION:The Tor network gives anonymity to Internet users by relaying 
 their traffic through the world over a variety of routers. This incurs und
 esirable latency\, and we explore where this latency occurs. Experiments d
 iscount transport latency and computational latency to determine there is 
 a substantial component that is caused by\ndelay. We determine that conges
 tion control is causing the delay.\n\nTor multiplexes multiple streams of 
 data over a single TCP connection. This is not the proper use of TCP\, and
  as such results in the improper application of\ncongestion control. We il
 lustrate an example of this occurrence on a Tor node in the wild and also 
 illustrate how packet dropping and reordering cause interference\nbetween 
 the multiplexed streams.\n\nOur solution is to use a TCP-over-DTLS transpo
 rt between routers\, and give each stream of data its own TCP connection. 
 We give our design for our proposal\, and show\nexperiments evidence to il
 lustrate that our proposal has in fact resolved the multiplexing issues di
 scovered in our system performance analysis. The future work\ngives a numb
 er of steps towards optimizing and improving our work. 
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Building
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