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Possible upcoming attempts to disable the Tor network

by arma | December 19, 2014

The Tor Project has learned that there may be an attempt to incapacitate our network in the next few days through the seizure of specialized servers in the network called directory authorities.

  • 350 comments

New Tor Denial of Service Attacks and Defenses

by robgjansen | January 24, 2014

New work on denial of service in Tor will be presented at NDSS '14 on Tuesday, February 25th, 2014:

  • 19 comments

Upcoming Events

December 14, 2019 - December 15, 2019
Hackers Next Door (Brooklyn)
December 14, 2019
Criptobaile (Brasília)
January 09, 2020
Censorship Resistance für den Anonymisierungsdienst Tor (Hagenberg)
See All Upcoming Events

Recent Updates

Modularizing Key Aspects of the Tor Network, Supported by MOSS

by gaba | December 12, 2019

In 2018, the Tor Project was awarded a grant from Mozilla’s Open Source Support (MOSS) program’s Mission Partners track to improve

Digital Rights are Human Rights

by ggus | December 10, 2019

In honor of the United Nations' proclamation and adoption of the Universal Declaration of Human Rights (UDHR) in 1948, December 10 is Human Rights Day.

New Release: Tor 0.4.2.5 (also 0.4.1.7, 0.4.0.6, and 0.3.5.9)

by nickm | December 09, 2019

Ater months of work, we have a new stable release series! If you build Tor from source, you can download the source code for 0.4.2.5 on the website. Packages should be available within the next several weeks, with a new Tor Browser around January 7.

This is the first stable release in the 0.4.2.x series. This series improves reliability and stability, and includes several stability and correctness improvements for onion services. It also fixes many smaller bugs present in previous series.

Per our support policy, we will support the 0.4.2.x series for nine months, or until three months after the release of a stable 0.4.3.x: whichever is longer. If you need longer-term support, please stick with 0.3.5.x, which will we plan to support until Feb 2022.

Today we are also releasing updates to our older series: 0.4.1.7 (changelog), 0.4.0.6 (changelog), and 0.3.5.9 (changelog), which you can download at dist.torproject.org.  Note that the 0.4.0.x series and the 0.2.9.x series will become unsupported early next year, so if you're running one of those versions, you should plan to upgrade.

Below are the changes in 0.4.2.5, since 0.4.1.4-rc. For a complete list of only the changes since 0.4.2.4-rc, see the ChangeLog file.

Changes in version 0.4.2.5 - 2019-12-09

  • Major features (directory authorities):
    • Directory authorities now reject relays running all currently deprecated release series. The currently supported release series are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
  • Major features (onion service v3, denial of service):
    • Add onion service introduction denial of service defenses. Intro points can now rate-limit client introduction requests, using parameters that can be sent by the service within the ESTABLISH_INTRO cell. If the cell extension for this is not used, the intro point will honor the consensus parameters. Closes ticket 30924.

 

The Next Chapter in Anti-Censorship

by arma | December 04, 2019

The video from my DEF CON 2019 talk ("The Tor Censorship Arms Race: The Next Chapter") is now up:

© 2019 The Tor Project

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