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Explore how zero-knowledge proofs can enhance privacy in digital identity credentials through this 30-minute conference talk from NorthSec 2026. Learn about the current state of digital identity systems, including mobile Driver's Licenses (mDL) and corporate identity solutions like Microsoft Entra, and understand how these technologies are building the internet's missing identity layer. Discover the privacy challenges inherent in existing frameworks like Selective-Disclosure JSON Web Tokens (SD-JWT) and mDLs, particularly the cryptographic links between credential issuance and presentation that enable tracking by issuers and verifiers. Examine various cryptographic solutions including blind signatures and group signatures, and understand why their implementation requires significant system overhauls. Delve into an innovative alternative approach using zero-knowledge proof mechanisms to present existing identity credentials while achieving enhanced privacy levels. See a demonstration of the Crescent open-source framework, which enables users to prove specific claims such as residency or age verification without unnecessary data disclosure. Witness practical applications including proving current employment status to access sensitive employer resources and age verification for social networks using mDL credentials, all while preventing employers and government entities from tracking credential usage.
