Distributed randomness using weighted VRFs with Benny Pinkas | a16z crypto research talks
Source: YouTube · a16z crypto · published Oct 4, 2024 · 58:12
This presentation introduces a novel verifiable random function (VRF) protocol implemented on the Aptos blockchain, designed to provide fast, secure randomness for applications 0:57. The protocol generates randomness within 30 milliseconds after block commitment, enabling efficient use in applications like games and zero-knowledge proofs 12:44. Unlike external oracles, this solution provides immediate, available randomness integrated directly into the blockchain's consensus process 14:17.
Key Takeaways:
• The Aptos blockchain processes transactions with finality in under a second, requiring all protocols to be extremely fast and efficient 1:38
• The protocol uses a threshold VRF where validators generate new distributed keys every 2 hours based on stake distribution 18:01
• The implementation leverages aggregatable publicly verifiable secret sharing (PVSS) to reduce communication overhead from broadcasting all transcripts to just one 30:05
• Each validator sends only a constant-size share regardless of its stake weight, significantly improving efficiency compared to traditional approaches 35:03
The protocol represents a significant advancement in providing practical, verifiable randomness for blockchain applications without sacrificing performance 1:02.
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so it's my pleasure to introduce Benny pinkas today uh Benny is a researcher at abos lab if you notice they're our neighbors I think down one floor Benny is also uh a professor of computer science at barand University Benny has many uh Works in NPC space he worked in NPC probably even before some of you have been born so he he really stood at the origin of the field um it's my feeling is that Benny has worked on every interesting um Direction and NPC research and kind of left his uh contribution there uh Benny also uh worked for various companies including Google VMware hit buckard so he really stands at the intersection of theory and practice and today he's going to uh tell us about very exciting protocol that Abus has developed Ved um fully designed I think and brought into production in…