Tor Messenger 0.4.0b1 is released

We are pleased to announce another public beta release of Tor Messenger. This release features important improvements to the stability and security of Tor Messenger. All users are encouraged to upgrade.

Tor Messenger 0.3.0b2 users will be automatically prompted to install the update (similar to Tor Browser). On installing and restarting, the update will be applied; your account settings and OTR keys will be preserved.


Please note that Tor Messenger is still in beta. The purpose of this release is to help test the application and provide feedback. At-risk users should not depend on it for their privacy and safety.

Linux (32-bit)

Linux (64-bit)




The sha256sums-signed-build.txt file containing hashes of the bundles is signed with the key 0xB01C8B006DA77FAA (fingerprint: E4AC D397 5427 A5BA 8450 A1BE B01C 8B00 6DA7 7FAA). Please verify the fingerprint from the signing keys page on Tor Project's website.


Tor Messenger 0.4.0b1 -- March 06, 2017

  • All Platforms
    • Use the tor-browser-45.7.0esr-6.5-1-build1 tag on tor-browser
    • Use the THUNDERBIRD_45_7_0_RELEASE tag on comm-esr45
    • Update tor-browser to 6.5
    • Update tor-launcher to
  • Windows
    • Fix automatic generation of complete MAR files
    • Trac 21231: Enable intl-api

Updates for old Tor stable release series:,,,,

Hi! We've just tagged and uploaded new versions for the older 0.2.4 through 0.2.8 release series, to backport important patches and extend the useful life of these versions.

If you have the option, we'd recommend that you run the latest stable release instead of these. They are mainly of interest to distribution maintainers who for whatever reason want to track older release series of Tor.

You can, as usual, find the source at For a list of the backported changes in each release, see one of the nice handcrafted links below:

Please note that these releases are larger than we expect most future old-stable releases to be, because until recently we didn't have an actual policy of which releases should receive backports and support. You can learn more about our plans for "regular" and "long-term support" releases of Tor on the wiki.

Tor is released

Tor fixes some remaining bugs, large and small, in the 0.3.0 release series, and introduces a few reliability features to keep them from coming back.

This is the first release candidate in the Tor 0.3.0 series. If we find no new bugs or regressions here, the first stable 0.3.0 release will be nearly identical to it.

You can download the source code from the usual place on the website, but most users should wait for packages to become available over the upcoming weeks.

Please note: This is a release candidate, but not a stable release. Please expect more bugs than usual. If you want a stable experience, please stick to the stable releases.

Changes in version - 2017-03-01

  • Major bugfixes (bridges):
    • When the same bridge is configured multiple times with the same identity, but at different address:port combinations, treat those bridge instances as separate guards. This fix restores the ability of clients to configure the same bridge with multiple pluggable transports. Fixes bug 21027; bugfix on
  • Major bugfixes (hidden service directory v3):
    • Stop crashing on a failed v3 hidden service descriptor lookup failure. Fixes bug 21471; bugfixes on tor-

  read more »

Tor is released

Tor backports a security fix for users who build Tor with the --enable-expensive-hardening option. It also includes fixes for some major issues affecting directory authorities, LibreSSL compatibility, and IPv6 correctness.

The Tor 0.2.9.x release series is now marked as a long-term-support series. We intend to backport security fixes to 0.2.9.x until at least January of 2020.

You can download the source code from but most users should wait for next week's upcoming Tor Browser release, or for their upcoming system package updates.

Changes in version - 2017-03-01

  • Major bugfixes (directory authority,
    • During voting, when marking a relay as a probable sybil, do not clear its BadExit flag: sybils can still be bad in other ways too. (We still clear the other flags.) Fixes bug 21108; bugfix on
  • Major bugfixes (IPv6 Exits, backport from
    • Stop rejecting all IPv6 traffic on Exits whose exit policy rejects any IPv6 addresses. Instead, only reject a port over IPv6 if the exit policy rejects that port on more than an IPv6 /16 of addresses. This bug was made worse by 17027 in, which rejected a relay's own IPv6 address by default. Fixes bug 21357; bugfix on commit 004f3f4e53 in

  read more »

Tor in Google Summer of Code 2017


Interested in coding on Tor and getting paid for it by Google? If you are a student, we have good news for you: we have been accepted as a mentoring organization for Google Summer of Code 2017!

Here's the facts: GSoC gives you the opportunity to work on your own Tor-related coding project with one of the Tor developers as your mentor. Your mentor will help you when you're stuck and guide you in becoming part of the Tor community. Google pays you for the three months of your project, so that you can focus on coding and don't have to worry about how to pay your bills.

Did we catch your attention? These are your next steps: Go look at the Google Summer of Code FAQ to make sure you are eligible to participate. Have a look at our ideas list to see if one of those projects matches your interests. If there is no project on that list that you'd want to work on, read the documentation on our website and make up your own! Come to the tor-dev@ list or #tor-dev on OFTC and let us know about your project idea. Communication is essential to success in the summer of code, and we're unlikely to accept students we haven't heard from before reading their application. So really, come to the list or IRC channel and talk to us!

Finally, write down your project idea using our template and submit your application to Google before April 3rd.

We are looking forward to discussing your project idea with you!

Tor is released:

Tor fixes a few significant bugs introduced over the 0.3.0.x development series, including some that could cause authorities to behave badly. There is also a fix for a longstanding bug that could prevent IPv6 exits from working. Tor also includes some smaller features and bugfixes.

The Tor 0.3.0.x release series is now in patch-freeze: no additional features will be considered for inclusion in 0.3.0.x. We suspect that some bugs will probably remain, however, and we encourage people to test this release.

You can download the source code from the usual place on the website, but most users should wait for packages to become available over the upcoming weeks.

Please note: This is an alpha release. Please expect more bugs than usual. If you want a stable experience, please stick to the stable releases.

Below are the changes since

Changes in version - 2017-02-03

  • Major bugfixes (directory authority):
    • During voting, when marking a relay as a probable sybil, do not clear its BadExit flag: sybils can still be bad in other ways too. (We still clear the other flags.) Fixes bug 21108; bugfix on
    • When deciding whether we have just found a router to be reachable, do not penalize it for not having performed an Ed25519 link handshake if it does not claim to support an Ed25519 handshake. Previously, we would treat such relays as non-running. Fixes bug 21107; bugfix on
  • Major bugfixes (entry guards):
    • Stop trying to build circuits through entry guards for which we have no descriptor. Also, stop crashing in the case that we *do* accidentally try to build a circuit in such a state. Fixes bug 21242; bugfix on

  read more »

Tor Browser in numbers

Tor Browser is the secure and anonymous way to browse the web and access onion services. Tor Metrics' new visualization of Tor Browser downloads and updates shows that Tor Browser is downloaded 100,000 times from the Tor website every day! These could be new Tor users or existing users who are downloading it again.

The Signature downloads subgraph shows that between 5,000 and 15,000 users per day tried to verify that Tor Browser was signed by our developers after downloading it. Verifying the signature is the surest way to know that that executable is the legitimate version from Tor and not a benign or malicious third-party one. It is important to increase the number of users that verify their downloads in the future through education and assistance, and knowing the numbers is the first step.

The Update pings subgraph shows ~2,000,000 checks for a new Tor Browser version being made every day. Each running instance of Tor Browser makes a minimum of two such requests per day, and another request at the start of each session. As of now, we don't have any data on how long a typical Tor Browser session lasts or how often users restart their browser. But the update number is still useful to observe trends. For instance, look at the sharp drop of update pings at the end of January. We don't yet know what happened there, though it coincides with the Tor Browser 6.5 release, and the pattern looks similar to what happened when the first version of the 6.0 series was released. We use these graphs to recognize such anomalies, investigate them, and track our explanations here.

Lastly, the Update requests subgraph shows spikes every few weeks with peaks between 750,000 and 1,000,000 requests. This happens when a new Tor Browser version is released, which tells us that automated updates are working!

We sourced the data used above from Tor Project web server logs. Don't worry—we don't record what we do not need (your IP addresses or time of day of requests) and remove potentially identifying information (such as request parameters and the user agent string) before processing. We also delete the original logs afterwards and only keep a sanitized version.

Come back to Tor Metrics often! All of our graphs and tables are updated daily, and we are working to add additional ones in the future. We also encourage you to dig through the data we use and tell us if you find something interesting.

We would like to thank the generous community donations for funding our work. Donations to Tor Project not only help fund new work, but lessen our dependencies on institutions for funding. Keep us independent by donating today!

Tor at the Heart: Security in-a-Box

This is one of a series of periodic blog posts where we highlight other organizations and projects that rely on Tor, build on Tor, or are accomplishing their missions better because Tor exists. Please support the Tor Project! We're at the heart of Internet freedom.
Donate today!

Security in-a-Box

More than ten years ago, Tactical Tech and Front Line Defenders started providing digital security trainings for human rights defenders at risk around the world. Soon thereafter, they created Security in-a-Box to supplement those trainings and to support self-learning and peer-education among those defenders.

Security in-a-Box offers general advice and practical walkthroughs designed to help its users secure their digital information and communication by choosing the right software and integrating it into their daily lives.

Hands-on guides

Security in-a-Box offers a number of Tool Guides that explain step-by-step how to download, install, and use digital security tools on Linux, Windows, Mac OS X, and Android. Some of these guides that were recently updated in 11 languages include:

  • Tor Browser for anonymity and censorship circumvention (on Windows & Linux)
  • Signal for encrypted messaging and Voice-over-IP calls on Android
  • VeraCrypt for file encryption (on Windows & Linux)
  • Thunderbird and OpenPGP for email encryption (on Windows & Linux)
  • KeePassX for secure password management (on Windows & Linux)
  • Firefox with add-ons for more secure web browsing (on Windows & Linux)
  • Jitsi and OTR for encrypted instant messaging (on Windows & Linux)

Other Tool Guides cover setting up a Riseup email account, securing the Windows operating system, and protecting data when using social networking platforms (like Facebook and Twitter).

Security in-a-Box also includes a few community-specific toolkits that are tailored for LGBTI communities in The Middle-East and North Africa and Sub-Saharan Africa, for Environmental rights defenders and for Women human rights defenders.

Tips and Tactics

As digital security is a process that extends well beyond the adoption of specific tools, Security in-a-Box also offers Tactics Guides that propose new ways of thinking about security and recommend practices that might strengthen it. Some of these include:


Over the years, a community of digital security trainers, editors, translators, and privacy advocates has sprung up around Security in-a-Box. Many digital security trainers from Africa, Latin America, Central and Southeast Asia, Europe and North America rely on Security in-a-Box for their trainings and contribute to its development.

Thanks to the project’s community translators, Security in-a-Box is published in 17 different languages. Recently updated translations include: Arabic, Spanish, Farsi, French, Indonesian, Portuguese, Russian, Thai, Turkish, Vietnamese and Chinese. As a result, Security in-a-Box reaches well over a million people each year with advice on digital security, online privacy and censorship circumvention.

None of this would have been possible without the work of the software developers who create these tools in the first place, and to whom we are extremely grateful. Donate to the Tor Project today!

Written by Maria Xynou (Tactical Tech) and Wojtek Bogusz (Front Line Defenders)

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