The Mixminion Anonymous Remailer Protocol

Presented at DEF CON 10 (2002), Aug. 2, 2002, 3 p.m. (50 minutes)

Mixminion is a message-based anonymous remailer protocol intended to take the place of the old Mixmaster network. Mixminion provides secure single-use reply blocks (Mixmaster provides no support for replies, instead relying on the older and less secure Cypherpunk remailers), and introduces nymservers that allow users to maintain long-term pseudonyms using single-use reply blocks as a primitive. It also integrates directory servers that allow users to learn public keys and performance statistics of participating remailers. I'll cover a variety of serious anonymity issues with Mixmaster and other deployed networks and published designs, and also describe some of the many surprising anonymity risks that come from adding these new services.


Presenters:

  • Roger Dingledine - The Free Haven Project
    As a cryptographer and network security expert, Roger Dingledine lives in that space between theory and practice. He prefers to tackle the really hard problems so one day we can build real solutions. Current interests include anonymous publishing and communication systems, censorship-resistance, attack-resistance for decentralized networks, and reputation.

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