Perpetual encryption with Yevgeniy Dodis | a16z research
Source: YouTube · a16z crypto · published Sep 27, 2024 · 1:23:46
The video presents Perpetual Encryption, a novel cryptographic approach for creating private blockchains on public infrastructure 0:53. The goal is to enable small companies to deploy private blockchains that leverage public blockchain consensus while maintaining privacy from outsiders 1:04.
Key Takeaways:
• Perpetual Encryption allows encrypted transactions to appear as random strings to outsiders while maintaining private consensus within a group 6:54
• The system handles forks through a complaint mechanism where honest members can detect and report invalid transactions 24:00
• Keys must rotate when group membership changes to ensure former members cannot access new transactions 29:36
• The encryption scheme provides post-compromise security and prevents former members from linking transactions to specific epochs 33:06
• Unlike approaches using zero-knowledge proofs, this method aims for efficiency with linear state and sublinear encryption/decryption 33:53
The talk proposes a balanced approach that simplifies blockchain deployment for private use while maintaining strong privacy guarantees.
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First 800 characters of the transcript
so we're really uh glad to have you have Genny dois a professor from NYU uh just uh up the street from here uh visiting today um so yeah you have Genny uh extremely prolific cryptographer and a huge number of areas uh and has shown a good ability to jump in on you know previously on Randomness generation on secure messaging and encryption and now you have Genny has been saying he really wants to start researching blockchains uh so yeah really glad that we got him this Summer oh great thank you Joe and thank you for having me it's like uh I'm excited to have such a great vibrant group so close to nvu um so yeah so this is like my our so this is Joint work with Daniel y this is our first Venture into something kind of related to blockchain uh but in particular so I'll tell you about Perpetua…