[tor-project] Anti-censorship team meeting notes, 2024-01-25

Thu Jan 25 17:31:57 UTC 2024

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?scope=all&utf8=%E2%9C%93&state=opened&assignee_id=None
    <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_name%5B%5D=Sponsor%20150

== Announcements ==

  *

== Discussion ==

  * SQS rendezvous deployment

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

  * https://github.com/net4people/bbs/issues/325"Default 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&end=2024-01-25&country=cn
    <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/bridgestatus/-/blob/3da850b7399a735f52daa8059694bbd9947594b1/recentResult_cnnext#L86-105

  * 2024-01-10
    https://gitlab.torproject.org/tpo/anti-censorship/connectivity-measurement/bridgestatus/-/blob/921f6cd777f68d551d06d7f78d075b34392cb154/recentResult_cnnext#L85-104

  * 2023-12-10
    https://gitlab.torproject.org/tpo/anti-censorship/connectivity-measurement/bridgestatus/-/blob/1b857f0389539e38974c76a68e633d127c7fd188/recentResult_cnnext#L85-104higher
    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/snowflake/-/issues/40323

  * - 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/snowflake/-/issues/40299#note_2987907

  * - answered a question about distribution of users over snowflake
    bridges
    https://lists.torproject.org/pipermail/anti-censorship-team/2024-January/000333.html

  * - hacked a little bit on ALPN-01 ACME challenge in snowflake server
    https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40320

  * Next week:

  * - review draft MR for unreliable data channels
    https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/merge_requests/219

  * - open issue to have snowflake-client log whenever KCPInErrors is
    nonzero
    https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40262#note_2886018

  * - parent:
    https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40267

  * - 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/-/merge_requests/11https://gitlab.torproject.org/tpo/anti-censorship/docker-obfs4-bridge/-/merge_requests/11)

  * - 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

-- 
---
onyinyang

GPG Fingerprint 3CC3 F8CC E9D0 A92F A108 38EF 156A 6435 430C 2036

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