Tor: The Second-Generation Onion Router

Abstract

We present Tor, a circuit-based low-latency anonymous communication service. This second-generation Onion Routing system addresses limitations in the original design by adding perfect forward secrecy, congestion control, directory servers, integrity checking, configurable exit policies, and a practical design for location-hidden services via rendezvous points. Tor works on the real-world Internet, requires no special privileges or kernel modifications, requires little synchronization or coordination between nodes, and provides a reasonable tradeoff between anonymity, usability, and efficiency. We briefly describe our experiences with an international network of more than 30 nodes. We close with a list of open problems in anonymous communication.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2004
Accession Number
ADA465464

Entities

People

  • Nick Mathewson
  • Paul Syverson
  • Roger Dingledine

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Cyber
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Anonymous Communications
  • Application Protocols
  • Asymetric Encryption
  • Computer Networks
  • Computer Programs
  • Computers
  • Cryptography
  • Denial Of Service Attack
  • Electronic Mail
  • Electronic Messaging
  • Kernels (Operating System)
  • Mobile Phones
  • Network Protocols
  • Operating Systems
  • Reliability
  • Routing Protocols
  • Websites

Fields of Study

  • Computer science

Readers

  • Computer Networking
  • Database Systems and Applications