EthCC 2: Fatemeh Shirazi, Oskar Thorén, & Sebastian Bürgel
summary
Compares Whisper’s broadcast design to point‑to‑point needs, shows why metadata leaks persist, and proposes using mixed networks (Loopix concepts: mixing, delays, cover traffic) plus Sphinx packet formats to hide sizes and timing. Describes an implementation called Hopper that adds incentivized relay/storage via payment‑channels, sketches MLS for scalable groups, and notes open experiments (chaos unicorn day) and a W3F messaging repo for collaboration — practical tradeoffs: latency and bandwidth vs. anonymity.
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chapters (11)
- 0:00Introduction to the panel
- 3:07Messaging and whisper context
- 7:38Privacy challenges
- 12:08Limitations of tor and mixes
- 16:47Building decentralized systems
- 21:48Incentivization and relays
- 25:46Scalability and group security
- 32:15Reliability and tradeoffs
- 38:09Privacy as a configurable goal
- 44:24The role of infrastructure
- 50:20Closing thoughts
