Designing Privacy Enhancing Technologies

Volume 2009 of the series Lecture Notes in Computer Science pp 67-95


The Free Haven Project: Distributed Anonymous Storage Service

  • Roger DingledineAffiliated withMIT
  • , Michael J. FreedmanAffiliated withMIT
  • , David MolnarAffiliated withHarvard University

* Final gross prices may vary according to local VAT.

Get Access


We present a design for a system of anonymous storage which resists the attempts of powerful adversaries to find or destroy any stored data. We enumerate distinct notions of anonymity for each party in the system, and suggest a way to classify anonymous systems based on the kinds of anonymity provided. Our design ensures the availability of each document for a publisher-specified lifetime. A reputation system provides server accountability by limiting the damage caused from misbehaving servers. We identify attacks and defenses against anonymous storage services, and close with a list of problems which are currently unsolved.