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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

Traffic correlation using netflows

by arma | November 14, 2014

People are starting to ask us about a recent tech report from Sambuddho's group about ho

  • 86 comments

On the recent Black Hat 2014 Talk Cancellation

by phobos | July 21, 2014

As posted by Roger on the Tor-Talk mailing list:

Hi folks,

  • 61 comments

Experimental Defense for Website Traffic Fingerprinting

by mikeperry | September 04, 2011

Updated 09/05/2011: Add link to actual

  • 23 comments

"One cell is enough to break Tor's anonymity"

by arma | February 18, 2009

Tomorrow there's a talk at Black Hat DC by Xinwen Fu on an active attack that can allow traffic confirmation in Tor.

  • 25 comments

The MD5 certificate collision attack, and what it means for Tor

by nickm | December 30, 2008

Today, a team of security researchers and cryptographers gave a talk at the 25th Chaos Communication Congress (25C3), about a

  • 7 comments

Media coverage of "Covert channel vulnerabilities in anonymity systems"

by sjmurdoch | February 03, 2008

Over the past few days there has been some coverage of my PhD thesis,

  • 1 comment

Upcoming Events

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Recent Updates

New Release: Tor Browser 10.0.9

by sysrqb | January 26, 2021

Tor Browser 10.0.9 is now available from the Tor Browser download page and also from our

New Release: Tor Browser 10.5a8

by sysrqb | January 26, 2021

Tor Browser 10.5a8 is now available from the Tor Browser Alpha download page and also from our

2020 Fundraising Results: Thank You!

by alsmith | January 25, 2021

We believe Tor is strongest when it is used by and supported by as many people as possible.

New release candidate: Tor 0.4.5.4-rc

by nickm | January 22, 2021

There's a new release candidate available for download. If you build Tor from source, you can download the source code for 0.4.5.4-rc from the download page on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release likely around this coming Tuesday.

Tor 0.4.5.4-rc is the second release candidate in its series. It fixes several bugs present in previous releases.

We expect that the stable release will be the same, or almost the same, as this release candidate, unless serious bugs are found.

Changes in version 0.4.5.4-rc - 2021-01-22

  • Major bugfixes (authority, IPv6):
    • Do not consider multiple relays in the same IPv6 /64 network to be sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
  • Major bugfixes (directory cache, performance, windows):
    • Limit the number of items in the consensus diff cache to 64 on Windows. We hope this will mitigate an issue where Windows relay operators reported Tor using 100% CPU, while we investigate better solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.

 

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