Hi all, Here's what the anti-censorship team has been up to in April: Snowflake --------- * Merged Turbo Tunnel features into Snowflake. (Allows persisting a session across separate proxies.) <https://bugs.torproject.org/33745> <https://lists.torproject.org/pipermail/tor-talk/2020-April/045571.html> Merging into Tor Browser is pending: <https://bugs.torproject.org/34043> * Implemented measures to hand out more restrictive proxies less often. <https://bugs.torproject.org/33666> * Split Snowflake into two repositories(one for Go, one for the web-based proxy code). <https://bugs.torproject.org/33593> * Updated pion webrtc in Tor Browser. <https://bugs.torproject.org/33576> BridgeDB -------- * Moved forward with creating a feedback loop between OONI and BridgeDB. Work-in-progress code is available at: <https://gitlab.torproject.org/torproject/anti-censorship/wolpertinger> <https://bugs.torproject.org/32740> * Removed PGP support from BridgeDB. The feature has been broken for quite a while, is overly complex, and not particularly useful. <https://bugs.torproject.org/17548> * Renamed a bunch of source code files in BridgeDB, so they no longer collide on a file system that's case insensitive. <https://bugs.torproject.org/29686> * Made BridgeDB's email responder more usable. The instructions are now more clear and it will return with bridges no matter what -- even if the user's request was malformed. <https://bugs.torproject.org/30941> * Improved a Python script that tests BridgeDB's email responder by periodically sending email. <https://bugs.torproject.org/12802> * Made progress towards improving the robustness of BridgeDB's email autoresponder, so it no longer gets confused by Gmail's quoted-printable responses. <https://trac.torproject.org/projects/tor/ticket/33835#ticket> GetTor ------ * Fixed a bug caused by malformed email addresses. <https://bugs.torproject.org/34027> * Refactored to remove duplicate code. <https://bugs.torproject.org/34035> * Cleaned up logs. <https://bugs.torproject.org/34061> * Fixed a bug in the service shutdown code. <https://bugs.torproject.org/34062> * Removed a bunch of old GetTor code. <https://bugs.torproject.org/32912> Miscellaneous ------------- * Reviewed a submission for the Tor Research Safety Board. * Moved forward with creating a "censorship snapshot" that encodes how each country blocks Tor. Eventually, this snapshot should help Tor Browser figure out how to best circumvent in each country. <https://bugs.torproject.org/28531> * Built a prototype of a lightweight censorship analyser that's meant to be run by censored users. It can help us create the censorship snapshot in #28531. <https://bugs.torproject.org/30794> * Created a new mailing list for anti-censorship service outage alerts. If this interests you, you can subscribe here: <https://lists.torproject.org/cgi-bin/mailman/listinfo/anti-censorship-alerts> * We organised two reading groups, in which we discussed the following two papers: <https://censorbib.nymity.ch/#Wang2020a> <https://censorbib.nymity.ch/#Nasr2020a> Cheers, Philipp