Katana VentraIP

Tor (network)

Tor, short for The Onion Router,[6] is free and open-source software for enabling anonymous communication.[7] It directs Internet traffic via a free, worldwide volunteer overlay network that consists of more than seven thousand relays.[8]

This article is about the software and anonymity network. For the software's organization, see The Tor Project. For the magazine, see Tor.com.

Using Tor makes it more difficult to trace a user's Internet activity. Tor protects personal privacy by concealing a user's location and usage from anyone performing network surveillance or traffic analysis.[9] It protects the user's freedom and ability to communicate confidentially through IP address anonymity using Tor exit nodes.[10]

patched relay software to prevent relays from relaying cells with "relay early" headers that were not intended.

[105]

planned update for users' proxy software so that they could inspect if they received "relay early" cells from the relays (as they are not supposed to), along with the settings to connect to just one guard node instead of selecting randomly from 3 to reduce the probability of connecting to an attacking relay[107]

[106]

recommended that onion services should consider changing their locations

[108]

reminded users and onion service operators that Tor could not prevent de-anonymization if the attacker controlled or could listen to both ends of the Tor circuit, like in this attack.

[109]

Developer(s)

Tor Project

13.0.9[125] Edit this on Wikidata / 22 January 2024

13.0.9[125] Edit this on Wikidata / 22 January 2024

13.0.9[125] Edit this on Wikidata / 22 January 2024

13.0.9[125] Edit this on Wikidata / 22 January 2024

13.0.9[125] Edit this on Wikidata / 22 January 2024

90–165 MB

37 languages[126]

The Tor Project

29 October 2015 (2015-10-29)[157]

0.5.0-beta-1 / 28 September 2017 (2017-09-28)[158][159]

English

Orbot logo

Orbot logo

Orbot 16.6.3, running under Samsung Internet

Orbot 16.6.3, running under Samsung Internet

Onion Browser on iPad

Onion Browser on iPad

Edit this at Wikidata

Official website

Anonymity Bibliography

Old website

Archived: Official List of mirror websites

—Animated introduction on YouTube

"How Tor Browser Protects Your Privacy and Identity Online"

—Presentation at the 31st Chaos Computer Conference

Tor: Hidden Services and Deanonymisation

a dynamic visualization of data flowing over the Tor network

TorFlow

in a 2016 presentation at the 32nd Annual Chaos Communication Congress

Tor onion services: more useful than you think

at the Radboud University Nijmegen in The Netherlands on anonymity systems in 2016

A core Tor developer lectures

given at the University of Waterloo in Canada: Tor's Circuit-Layer Cryptography: Attacks, Hacks, and Improvements

A technical presentation

given by Sarah Jamie Lewis

A Presentation at the March 2017 BSides Vancouver Conference on security practices on Tor's hidden services