Performance and security improvements for Tor: A survey

Mashael Alsabah, Ian Goldberg

Research output: Contribution to journalArticle

22 Citations (Scopus)


Tor [Dingledine et al. 2004] is the most widely used anonymity network today, serving millions of users on a daily basis using a growing number of volunteer-run routers. Since its deployment in 2003, there have been more than three dozen proposals that aim to improve its performance, security, and unobservability. Given the significance of this research area, our goal is to provide the reader with the state of current research directions and challenges in anonymous communication systems, focusing on the Tor network. We shed light on the design weaknesses and challenges facing the network and point out unresolved issues.

Original languageEnglish
Article number32
JournalACM Computing Surveys
Issue number2
Publication statusPublished - 1 Sep 2016
Externally publishedYes



  • Anonymity networks
  • Performance
  • Privacy-enhancing technologies

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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