CA
Caesar Academy B.V.
Master Thesis Project | ECDSA Zero-Knowledge Credentials in Yivi’s EUDI Wallet
Low visibility — this company rarely posts on big job boards.
Master Thesis project proposal “Designing and implementing an ECDSA-based Zero-Knowledge Credential Architecture for Yivi as EUDI Wallet” Context and motivation Background Yivi is a privacy-preserving digital identity platform that has successfully launched production deployments using IRMA/Idemix protocols based on zero-knowledge proof (ZKP) schemes. With the introduction of the EU Digital Identity (EUDI) Wallet regulation (eIDAS 2.0), Yivi aims to evolve into a compliant EUDI wallet while maintaining its strong privacy guarantees and crypto-agile architecture. The EUDI ecosystem increasingly standardises on: Verifiable Credentials (e.g. W3C VC, SD-JWT-VC, ISO 18013-5 mDL/MDOC) Presentation and issuance protocols such as OpenID4VCI and OpenID4VP Selective disclosure and zero-knowledge techniques, analysed in detail in ETSI TR 119 476, including BBS+, CL signatures and other privacy-enhancing cryptographic mechanisms. Yivi wants to leverage these developments while preserving its core privacy values: minimum disclosure, unlinkability, and user-controlled identity. Strategic challenge Today, many credentials in practice are signed using ECDSA keys (for example JWT-based credentials, SD-JWT-VC, mDL/MDOC. At the same time, privacy-preserving credential systems often rely on different cryptographic primitives (e.g. CL, BBS+ on BLS12-381). Yivi faces a strategic challenge: How to evolve towards an EUDI-