Configurable Asset Privacy and Proof-Carrying Disclosures with Ben Fisch | a16z crypto research
Source: YouTube · a16z crypto · published May 5, 2023 · 45:53
Cape (Configurable Asset Privacy) is a protocol that allows digital asset issuers to create custom privacy policies, balancing regulatory compliance with user privacy 0:48-1:05. The system enables flexible visibility controls through viewing keys, freezing capabilities, and digital credentials, moving beyond the all-or-nothing privacy approach of existing solutions 2:01-2:49.
Key Takeaways:
• Cape allows issuers to create assets with configurable privacy policies rather than requiring complete transparency or anonymity 1:56-2:32.
• The protocol uses viewing keys that enable designated parties (like auditors) to see transaction details above certain thresholds 4:22-4:43.
• Freezing functionality allows authorized parties to freeze assets while preserving privacy, using a specialized nullifier key system 22:02-23:54.
• Cape is EVM-compatible and deployed on testnets including Arbitrum and Celo 1:10-1:16.
• The system uses zero-knowledge proofs to maintain privacy while ensuring compliance with asset policies 11:36-12:31.
The protocol aims to address the regulatory challenges facing privacy systems by providing a balanced approach that could reduce collateral damage to innocent users when illicit activity is detected 37:00-37:47.
Sources:
- 0:48-1:05 Introduction to Cape and configurable asset privacy
- 1:56-2:32 Explaining the all-or-nothing privacy problem
- 4:22-4:43 Description of viewing keys and freezing keys
- 11:36-12:31 Zero-knowledge proof functionality
- 22:02-23:54 Technical explanation of freezing mechanism
- 37:00-37:47 Regulatory challenges and solutions
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First 800 characters of the transcript
welcome everybody to the seminar for the week we're really glad to have Ben Fish who uh just finished his PhD at Stanford last year working with Dan uh and now he's just started as a professor at Yale he's the co-founder and CEO of espresso Ben's known for his work on uh vdfs on uh proofs of uh groups of replication or catalytic proofs of space his work on uh darks and SuperSonics a whole lot of different areas so as well as his crack climbing techniques thanks Joe uh yeah so I'll I'll talk about configurable asset privacy um and preparing preparing disclosures for privacy polls this will be mostly focus on on this protocol that an application smartphone application that we built in espresso system is called king um which is uh currently deployed on arbitrums testnet and also on Syrian ass…