This list is the understanding that the Tor Project have about the issues we need to focus in Snowflake. It was updated in May 2022 by the anti-censorship team.

Volunteer proxy (extension)

• Improved user experience and feedback (e.g. gamifying the interface)
• Awareness and advocacy that the extension exists

Volunteer proxy (headless)

• Packaging and convenient images
• Making it configurable, so people can customize their contribution+
• Have some update mechanism
  • do the proxies need to report their versions?

Client

• PT API, feedback to parent process, auto-diagnosing failures
• Signaling channel to reach broker
• Pion webrtc library, stun connections, distinguishers via DPI

Broker

• Scaling / resiliency+
• Algorithms for matching volunteers to clients
• Tools for measuring / assessing volunteers, e.g. natprobe

Statistics (load, usage, reliability)

• At the broker
• At the bridge
• At our own clients (OONI, onionperf)
• Noticing and trying to explain anomalies in our stats

End to end resiliency and performance

• "How come some Snowflake bootstrap attempts are so slow?"
• Turbotunnel, KCP tuning
• Multi-path, multi-snowflake+

Use of snowflake outside Tor+

• Share the infrastructure with other projects+
  • tor/snowflake project select what projects will allow in the infra
  • proxy configurable to select what projects want to proxy
  • sharing the proxy pool
• modify the broker to support it(Multi-pool support)
• server more generic not tight to tor(make OR protocol optional?)