Nick Mathewson

The software I've worked on is either on Tor's gitweb page, or on my github page.

• Since early 2003, I have been writing software for the Tor Project. In 2006, we incorporated as a 501(c) nonprofit corporation in Massachusetts; I'm one of the directors. I work on the anonymity protocol, the core network daemon, and on several miscellaneous add-on programs.
• I'm the primary maintainer for Libevent, a networking library originally written by Niels Provos.
• I also help maintain the Freehaven Anonymity bibliography.
• There are some other miscellaneous projects of mine (and of other people) on my github page.

• I wrote some of the preliminaries for an implementation of the Pynchon Gate protocol.
• I'm the primary author of the software for Mixminion, an anonymous remailer. There hasn't been a new update in some while; I'm not so sure these days about the demand for high-latency anonymity tools.
• I did a project called Parsely once; it was a pretty neat solution to a problem nobody actually seems to have.
• PolyJ was my principal undergraduate project. It was meant to demonstrate one way to add parameterized types to Java.
• I did my M.Eng work on a very minor facet of Jif.

I haven't published as much research as I'd like in the last few years; most of my technical writing has gone into various Tor design proposals and things like that.

That said, here are some papers I've helped write:

• Roger Dingledine, Nick Mathewson, Paul Syverson, Steven Murdoch. Tor: The Second-Generation Onion Router (2012 DRAFT)
  Work in progress update to the earlier Tor paper. [pdf]
• Aaron Johnson, Paul Syverson, Roger Dingledine, and Nick Mathewson. Trust-based Anonymous Communication: Adversary Models and Routing Algorithms.
  In the Proceedings of the 18th ACM conference on Computer and Communications Security (CCS 2011). [pdf]
• Roger Dingledine and Nick Mathewson. Design of a blocking-resistant anonymity system.
  Technical report. [pdf]
• Roger Dingledine and Nick Mathewson. Anonymity Loves Company: Usability and the Network Effect.
  In the Proceedings of the Fifth Workshop on the Economics of Information Security (WEIS 2006). [pdf]
• Len Sassaman, Bram Cohen, and Nick Mathewson. The Pynchon Gate: A Secure Method of Pseudonymous Mail Retrieval.
  In the Proceedings of the Workshop on Privacy in the Electronic Society (WPES 2005). [pdf]
• Nick Mathewson, Roger Dingledine. Practical Traffic Analysis: Extending and Resisting Statistical Disclosure.
  In the Proceedings of Privacy Enhancing Technologies workshop (PET 2004), May 2004. [pdf]
• Roger Dingledine, Nick Mathewson, Paul Syverson. Tor: The Second-Generation Onion Router.
  In the Proceedings of the 13th USENIX Security Symposium, August 2004. [pdf]
• Nick Mathewson, Roger Dingledine. Mixminion: Strong Anonymity for Financial Cryptography.
  Financial Cryptography, Feb 2004.
• Roger Dingledine, Nick Mathewson, Paul Syverson. Reputation in P2P Anonymity Systems.
  Workshop on economics of p2p systems, June 2003  [pdf]
• George Danezis, Roger Dingledine, Nick Mathewson. Mixminion: Design of a Type III Anonymous Remailer Protocol.
  IEEE Symposium on Security and Privacy, May 2003. [pdf, ps]
• Roger Dingledine, Nick Mathewson, Paul Syverson. Reputation in Privacy Enhancing Technologies.
  Computers, Freedom, and Privacy, Apr 2003. [html]
• Nick Mathewson. Verifying mostly-static information flow control in Java Bytecode.
  MIT M.Eng. Thesis under supervision of Barbara Liskov, June 2002. [ps]

To contact me, send email to nickm @ alum . mit . edu. Although I try to answer my email fairly regularly, I get a lot of it, so before sending personal email, please check whether there is a mailing list or bug tracker that might be a better fit. In particular, please use appropriate mailing lists for technical support if you possiby can.

My current PGP key is here.
The fingerprint is: 2133 BC60 0AB1 33E1 D826 D173 FE43 009C 4607 B1FB

My old PGP key is here.
The fingerprint is: B35B F85B F194 89D0 4E28 C33C 2119 4EBB 1657 33EA

I have a PGP key transition statement for your amusement.