BridgeDB was extended to filter bridges that are blocked in a specified country from its response. BridgeDB needs a list of what is blocked, and where, for this to work.
We want to answer the question "What is blocked, and where", with the constraint that the list of bridges should not become public.
Here are a few questions to kick off the discussion. Any insight, more questions (or answers) are appreciated.
1. Do we want active or passive reachability testing (or both)? 2. For active scanning, OONI comes to mind. Do we trust operators with the list of bridges? A partial list of bridges? 3. Does an open TCP port mean that a bridge is 'reachable' or should the test complete a full handshake? 4. What about pluggable transports (PT)? Will the Bridge Authority do independent reachability testing of PTs? 5. What concerns are there regarding detectability of active scanning? 6. For passive censorship detection, are there other indicators other than relay/bridge usage-by-country over time? 7. Should relays report per-country usage by address/transport? What are the upsides? Downsides?
Thanks in advance! --Aaron