Threshold ECDSA in 3 rounds with Abhi Shelat | a16z crypto research talks
Source: YouTube · a16z crypto · published Oct 4, 2024 · 50:42
This video presents a framework for understanding threshold ECDSA signatures, which are essential for distributed cryptographic systems where multiple parties must jointly create a signature without revealing their individual secret shares 0:09.
Key Takeaways:
• ECDSA became dominant despite cryptographic flaws partly due to patents on Schnorr signatures that locked down cryptography for decades 1:35 5:18.
• Three main techniques for threshold ECDSA: inverted nonce rewriting, multiplicative sharing, and the ECDSA tuple approach using the Barlon-Beaver trick twice 11:00 22:47.
• The protocol achieves efficiency using existing commitments (public key and R value) to create simple consistency checks avoiding expensive zero-knowledge proofs 30:35 36:07.
The protocol provides a three-round threshold ECDSA scheme with better performance than previous approaches, using vector oblivious linear evaluation and novel consistency verification for multi-party settings 25:55.
Sources:
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First 800 characters of the transcript
it's my pleasure to introduce Abby shalat Abby is a professor at Northeastern University he's also works at Google right now he is an author of many exciting works very relevant to our space including RSA setup ceremonies and most recently ecdsa signatures in a threshold setting which are kind of the fastest right now for multibody cases so a lot of um companies are trying to deploy them and use them in production and ab is going to talk about that today thank you thank you lar for inviting me here it's been great week here um also you didn't mention I'm a budding standup comedian so I hope to share some of my comedy about ecdsa with you today um and this is Joint work with uh my three students Jack Yash and Issa which have been just fantastic uh many of you have asked about academic caree…