CITP Luncheon Speaker Series:
Philipp Winter – Keeping Bad Actors Out of the Tor Network

CITP Luncheon Series

Date: Tuesday, September 29, 2015
Location: 306 Sherrerd Hall
This talk will not videotaped.

Food and discussion begin at 12:30 pm. Open to current Princeton faculty, staff, and students. Open to members of the public by invitation only. Please contact Laura Cummings-Abdo at if you are interested in attending a particular lunch.

The Tor anonymity network is run by a globally distributed set of volunteers. Not all volunteers, however, have good intentions. The Tor network is sometimes targeted by attackers who pursue different goals. In this talk, Winter will give an overview of how The Tor Project handles malicious relays, provide anecdotes of past incidents, and present ongoing research on the topic.


Winter spent his PhD thesis working on understanding and circumventing country-wide Internet censorship systems. Most of his work was about the Tor anonymity network. In addition to his research on anonymity and network security, he is an avid free software hacker, maintaining several software projects as a member of The Tor Project.