Hi everyone!

Here are our meeting logs:

http://meetbot.debian.net/tor-meeting/2021/tor-meeting.2021-12-16-15.59.html

and our meeting pad:

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

Next meeting: Thursday January 6th 16:00 UTC

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

== Goal of this meeting ==

Weekly checkin about the status of anti-censorship work at Tor. Coordinate collaboration between people/teams on anti-censorship at Tor.

== 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...

Sponsor 30

https://gitlab.torproject.org/groups/tpo/-/milestones/4

https://gitlab.torproject.org/groups/tpo/-/milestones/7

https://gitlab.torproject.org/groups/tpo/-/milestones/5

https://gitlab.torproject.org/groups/tpo/-/milestones/6

Sponsor 28

must-do tickets: https://gitlab.torproject.org/groups/tpo/-/milestones/10

possible tickets: https://gitlab.torproject.org/groups/tpo/-/issues?scope=all&utf8=%E2%9C%...

== Announcements ==

New default bridge in TorBrowser: https://metrics.torproject.org/rs.html#details/3D98E4E19BDBBF2047DDAC7892B39...

== Discussion ==

Current status in Russia

meek-azure now unblocked?

seems to be working https://ntc.party/t/ooni-reports-of-tor-blocking-in-certain-isps-since-2021-...

Moat is no longer distributing old bridges in Russia

https://gitlab.torproject.org/tpo/anti-censorship/team/-/issues/47#note_2766...

The new Telegram bot's bridges were all blocked but one

we need more mirrors of *.torproject.org as they get blocked

snowflake bridge has doubled its clients https://metrics.torproject.org/rs.html#details/5481936581E23D2D178105D44DB69...

the DTLS fingerprint fix seems to work

The new bridge obfs4 deusexmachina is already blocked (from 11.0.2, released 2021-12-08)

There is an article saying that an organization is petitioning to have Tor Browser removed from the Google and Apple app stores in Russia

https://m.gazeta.ru/social/news/2021/12/14/n_17011309.shtml

Further Snowflake fingerprint fixes

anyone working on adding ALPN support to DTLS Client Hello? https://github.com/pion/dtls/issues/408

dcf will upgrade the standalone proxies we operate

meskio will upgrade the docker image

need updates for the debian package and freebsd port as well

next meeting Thursday 6 January 2022

we have now 2k bridges https://metrics.torproject.org/networksize.html?start=2017-09-17&end=202...

== Actions ==

== Interesting links ==

https://eyedeekay.github.io/blizzard/

Snowflake proxy plugin for I2P

== Reading group ==

We will discuss "Meteor: Cryptographically Secure Steganography for Realistic Distributions" on 2022-01-??

https://dl.acm.org/doi/10.1145/3460120.3484550

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): last updated 2021-12-09 Last week: - preliminary dump of snowflake shadow simulation scripts (needs more documentation and cleanup) - https://gitlab.torproject.org/cohosh/snowflake-simulation - hooked up our reachability measurements to grafana - s28 PI meeting - handled snowflake probe test outage (responded to alert) - snowflake DTLS fingerprinting fixes - DTLS fix: https://github.com/pion/dtls/pull/407 - Tor Browser MR: https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/merge_req... - bump version of Snowflake in Tor Browser - https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/merge_req... This week: - finish documenting and cleaning up shadow simulation scripts - use these snowflake + shadow scripts to do more performance testing - ensure everything is in place for end of phase II for s28 - https://gitlab.torproject.org/tpo/anti-censorship/team/-/milestones/1 - follow up on Snowflake DTLS fingerprinting work Needs help with:

arlolra: 2021-08-12

Last week:

- Migrate to v3 of the webextension manifest

Next week:

- Maybe get back to snowflake-webext #10

- Write up the pitch for our use case for supporting creating PeerConnections in background service workers https://github.com/w3c/webrtc-extensions/issues/77

Help with:

-

dcf: 2021-12-16

Last week:

- had a talk about push notifications https://gitlab.torproject.org/tpo/anti-censorship/team/-/issues/45

- posted an analysis of the quantity of BridgeDB captcha images https://lists.torproject.org/pipermail/anti-censorship-team/2021-December/th...

Next week:

- upgrade standalone snowflake proxies for the new DTLS fingerprint

Help with:

agix:2021-11-25

Last week:

- More work on gettor for twitter

Next week:

- Continue to work on gettor-twitter

Help with:

-

hanneloresx: 2021-3-4

Last week:

- Submitted MR for bridgestrap issue #14

Next week:

- Finish bridgestrap #14

- Find new issue to work on

Help with:

-

maxb: 2021-09-23

Last week:

- Worked on https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... re: utls for broker negotiation

- Had conversation with someone about upstream utls http round tripper https://github.com/refraction-networking/utls/pull/74

- Too busy with work :/

Next week:

- _Really_ want to get a PR for utls round tripper

meskio: 2021-12-16

Last week:

- russia censorship fires

- rotate blocked bridges in telegram bot

- implement BridgeDB country bridge blocklist and block nonworking moat bridges in russia (team#47)

- review BridgeDB mock clean up (bridgedb!29)

- review docker-obfs4-bridge change the nickname (docker-obfs4-bridge!6)

- merge docker-snowflake-proxy improvements (docker-snowflake-proxy!3)

- DRL implementors meeting

Next week:

- metrics bridge distributor metrics for rdsys (rdsys#67)

Shelikhoo: 2021-12-16 Last Week: - [Merge Request Awaiting] Add SOCKS5 forward proxy support to snowflake(snowflake!64) - [Merge Request Awaiting] Multi-arch docker image support with Dockerfile refactor for probetest(probetest!1) - [Merge Request] Add Google backend support for gettor updater - [Merge Request] Add callbacks in the client for key events during snowflake connections(snowflake#40076) - [Merge Request Review] Default to the main branch and cache go modules

- [Investigate] Random Like Stream Blocking on Certain IDC from gfw_report

- [Investigate] Implement metrics to measure snowflake churn(snowflake#34075)

- [Investigate] [Russia] Some ISPs are blocking Tor

- [Discussion] Proposal: Support for Dynamic IP obfs4 bridges with unattended proxy information update(aka "Subscription")

- [Discussion] Implement metrics to measure snowflake churn(snowflake#34075)

- [Discussion] Proposal: Push Notification Based Signaling Channel

- [Discussion] Proposal: HTTP(S) Download Test(bridgestrap#30)

Next Week: - [Discussion] Designing the Container Layout for rdsys - [Discussion] Proposal: Support for Dynamic IP obfs4 bridges with unattended proxy information update(aka "Subscription") - [Discussion] Implement metrics to measure snowflake churn(snowflake#34075) - [Discussion] Proposal: Push Notification Based Signaling Channel - [Investigate] rdsys Deployment Environment

HackerNCoder: 2021-12-16 This week: Last/done: Setup web mirror on tor.encryptionin.space Next: Get (new VPs with) new IP and setup new web mirror on new domain