ZK Whiteboard Sessions - S3M7: zkID (Anonymous Credentials), w/ Ying Tong

Описание: ZK Whiteboard Sessions - S3M7: zkID (Anonymous Credentials), w/ Ying Tong

For all additional info and resources watch it here: https://zkhack.dev/whiteboard/s3m7/

Full ZK Whiteboard Sessions - Season 1 playlist here:    • ZK Whiteboard Sessions - S1  
Full ZK Whiteboard Sessions - Season 2 playlist here:    • ZK Whiteboard Sessions - S2  
Full ZK Whiteboard Sessions - Season 3 playlist here:    • ZK Whiteboard Sessions - S3  

In this module, Nicolas Mohnblatt and Ying Tong explain the critical need for privacy-preserving digital ID systems using zk-SNARKs. She first covers existing systems, but shows how the methods used are flawed. These existing systems may inadvertently expose linkability and observability, allowing issuers and verifiers to track users across different presentations. The proposed solution, zkID, is a zk-SNARK architecture, which acts as a privacy layer over existing credentials. This method conceals the static signature and data, enabling private, unlinkable presentations to be verified without requiring issuers to change the cryptography underlying their systems. The discussion also covers advanced topics like credential revocation, deniable presentation, the out-of-protocol risks of de-anonymization, and the technical trade-offs between different ZK proof systems and the importance of standardization in the road to wide-scale adoption.


What you’ll learn:
00:00 Introduction and Session Outline
05:44 Current Digital ID Designs: LA Wallet example
12:02 Formally Stating the Privacy Invariant: The Unlinkability Problem
17:13 Adding Privacy Without Modifying Issuer Behavior: The zkID Solution
19:34 zkSNARK of a Signature System
27:31 Generalizing the ZKID Architecture
33:29 Credential Revocation Methods
42:02 Deniable Presentation / Plausible Deniability / Repudiation
50:29 The Risk of De-anonymization Through Data Correlation
53:24 Choosing a ZK Proof System: Trade-offs in Google’s vs. Microsoft’s design
1:03:01 The Importance of Standardization
1:07:33 Summary and Conclusion


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