Hey everyone!

Here are our meeting logs: http://meetbot.debian.net/tor-meeting/2024/tor-meeting.2024-01-25-15.58.html

And our meeting pad:

Anti-censorship work meeting pad --------------------------------

Anti-censorship --------------------------------

Next meeting: Thursday, February 116:00 UTC Facilitator: shelikhoo

Weekly meetings, every Thursday at 16:00 UTC, in #tor-meeting at OFTC (channel is logged while meetings are in progress)

This week's Facilitator: onyinyang

== Goal of this meeting ==

Weekly check-in about the status of anti-censorship work at Tor. Coordinate collaboration between people/teams on anti-censorship at the Tor Project and Tor community.

== Links to Useful documents ==

* Our anti-censorship roadmap:

* Roadmap:https://gitlab.torproject.org/groups/tpo/anti-censorship/-/boards

* The anti-censorship team's wiki page:

* https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/home

* Past meeting notes can be found at:

* https://lists.torproject.org/pipermail/tor-project/

* Tickets that need reviews: from sponsors, we are working on:

* All needs review tickets:

* https://gitlab.torproject.org/groups/tpo/anti-censorship/-/merge_requests?sc... https://gitlab.torproject.org/groups/tpo/anti-censorship/-/merge_requests?scope=all&utf8=%E2%9C%93&state=opened&assignee_id=None

* Sponsor 96 <-- meskio, shell, onyinyang, cohosh

* https://gitlab.torproject.org/groups/tpo/-/milestones/24

* Sponsor 150 <-- meskio working on it

* https://gitlab.torproject.org/groups/tpo/anti-censorship/-/issues/?label_nam...

== Announcements ==

*

== Discussion ==

* SQS rendezvous deployment

* follow up from last week: cohosh will try to deploy later today

* https://github.com/net4people/bbs/issues/325%22Default Snowflake bridges in Tor browser 13.0.8 stopped working properly in China since around 2024-01-12"

* dcf hasn't had a chance to look at the logs yet

* no big change in aggregate statistics https://people.torproject.org/~dcf/metrics-country.html?start=2023-11-01&... https://people.torproject.org/~dcf/metrics-country.html?start=2023-11-01&end=2024-01-25&country=cn

* BridgeStatus also shows many 10% results for snowflake bootstrap attempts in China

* 2024-01-25 https://gitlab.torproject.org/tpo/anti-censorship/connectivity-measurement/b...

* 2024-01-10 https://gitlab.torproject.org/tpo/anti-censorship/connectivity-measurement/b...

* 2023-12-10 https://gitlab.torproject.org/tpo/anti-censorship/connectivity-measurement/b... rate of bootstrap percent, some 100

* https://mastodon.social/@tor4zh/111811643889038641

* from packet capture from vantage point, appears that there is a full block of proxy (one way stun) and block of server hello packet (keep receiving client hello)

== Actions ==

== Interesting links ==

== Reading group ==

* We will discuss "" on

*

* Questions to ask and goals to have:

* What aspects of the paper are questionable?

* Are there immediate actions we can take based on this work?

* Are there long-term actions we can take based on this work?

* Is there future work that we want to call out in hopes that others will pick it up?

== Updates == Name:

* This week:

* - What you worked on this week.

* Next week:

* - What you are planning to work on next week.

* Help with:

* - Something you need help with.

cecylia (cohosh): 2024-01-25

* Last week:

* - merged SQS rendezvous feature

* - talked to browser team about lyrebird issue

* - worked on Lox module for Tor Browser

* This week:

* - finish Lox module implementation

* - update wasm-bindgen fork to fix some bugs and hopefully upstream changes

* - tor-browser-build updates for lox wasm + bindings generation

* - deploy SQS rendezvous changes at broker

* - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

* - rebase and try out manifest v3 patch

* - Conjure bridge maintenance

* Needs help with:

dcf: 2024-01-25

* Last week:

* -adjusted parity of upper port range on snowflake-02 https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

* - answered a question about distribution of users over snowflake bridges https://lists.torproject.org/pipermail/anti-censorship-team/2024-January/000...

* - hacked a little bit on ALPN-01 ACME challenge in snowflake server https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

* Next week:

* - review draft MR for unreliable data channels https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

* - open issue to have snowflake-client log whenever KCPInErrors is nonzero https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

* - parent: https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

* - open issue to disable /debug endpoint on snowflake broker

* - move snowflake-02 to new VM

Help with:

meskio: 2023-12-21     Last week: - grant writing     Next week:

Shelikhoo: 2024-01-25     Last Week:

* - HTTPS distributors in rdsys: https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/issues/191

* - update container image for snowflake-proxy and obfs4-proxy(Image is published already, while merge request under review: https://gitlab.torproject.org/tpo/anti-censorship/docker-snowflake-proxy/-/m...)

* - Merge request reviews

Next Week/TODO:

* - HTTPS distributors in rdsys: https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/issues/191

* - Inspect Snowflake Situation In China

onyinyang: 2023-01-25

* Last week(s):

* - Bug fixing and other things that come up as lox integration is rolled out

* - document API for lox client/server requests

* - get next unlock function

*

* This week:

* - Bug fixing and other things that come up as lox integration is rolled out

* - Figure out problem that makes distributor hang when bridges are not working

* -Make Lox invitation endpoint only accessible via telegram

* - attempt hyper upgrade again

*

* (long term things were discussed at the meeting!): https://pad.riseup.net/p/tor-ac-community-azaleas-room-keep

* - brainstorming grouping strategies for Lox buckets (of bridges) and gathering context on how types of bridges are distributed/use in practice

* Question: What makes a bridge usable for a given user, and how can we encode that to best ensure we're getting the most appropriate resources to people?

* 1. Are there some obvious grouping strategies that we can already consider?

* e.g., by PT, by bandwidth (lower bandwidth bridges sacrificed to open-invitation buckets?), by locale (to be matched with a requesting user's geoip or something?)

* 2. Does it make sense to group 3 bridges/bucket, so trusted users have access to 3 bridges (and untrusted users have access to 1)? More? Less?

*

theodorsm: 2023-01-11

* Last weeks:

* - Currently in the start phase of writing my master thesis (to be finished late june 2024) in communication technology on reducing distinguishability of DTLS. The goal is to implement a validated DTLS anti-fingerprinting library similar to uTLS (useful for Snowflake).

* Next weeks:

* - Talk with Sean DuBois about contributing to adding anti-fingerprinting capabilities to the pion library

* Help with:

* - Find recent data set of captured DTLS traffic