Interchain Timestamping for Interchain Security with David Tse | a16z crypto research talks
Source: YouTube · a16z crypto · published Apr 7, 2023 · 57:23
David Sze from Stanford and Babylon Chain presents research on using Bitcoin as a timestamping service to enhance proof-of-stake blockchain security 0:34. The key innovation is reducing unbonding periods in Proof-of-Stake systems from weeks to hours by leveraging Bitcoin's timestamping capabilities 21:56.
Key Takeaways:
• Proof-of-Stake systems face three major limitations: long unbonding periods (typically 3 weeks), unaccountable censorship, and difficulty bootstrapping economic security for small chains 3:14
• Bitcoin's timestamping service can reduce unbonding time from weeks to hours by providing verifiable timestamps for blockchain checkpoints, preventing "unslashable forks" 19:53
• Their system maintains 1/3 slashable safety and improves censorship resistance from 1/3 to 1/2 resilience threshold 28:46
The research demonstrates a practical implementation that reduces average unbonding time to 4.5 hours with 20-block Bitcoin confirmation depth 43:42.
Sources:
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First 800 characters of the transcript
okay so um welcome everyone to today's a16z crypto research seminar very happy um to introduce David say from um Stanford and also now Babylon chain um David's group over at Stanford I think has been doing some of the absolute best work in blockchain consensus for many years now so very happy to have him have him here David floor is yours all right thanks a lot Tim for inviting me here um yeah so um I'm at Stanford um and today I want to talk about some research we've been working on under the general umbrella we call interchange time stamping and we are also doing a startup Babylon chain but I'm going to leave right now from Stanford working on that so I'll uh give some discussion on the theory as well as give a demo of something that we've been building Okay so the merge has just happene…