Reproduce “PRETTINESS -- Privacy pResErving aTTrIbute maNagEment SyStem” on OpenResearch
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About this paper
Jelizaveta Vakarjuk, Alisa Pankova
Researchers from Cybernetica AS and Tallinn University of Technology developed PRETTINESS, a privacy-preserving attribute management system that addresses the European Digital Identity Wallet's requirements by securely managing user credentials with a centralized service. The system offers formal security guarantees under a Universal Composability model and provides efficient operations, such as credential issuance in ~8.1 seconds and presentation in ~5.7 seconds.
Key insights
- Centralized attribute management services can enhance usability (e.g., backups, issuance aid) while preserving user privacy, provided they cannot access sensitive data or track activities.
- Threshold cryptography, specifically blind threshold signatures and decryption, is effective in protecting user cryptographic keys on mobile devices and enabling privacy-preserving server assistance.
- A robust, privacy-preserving dual revocation mechanism (user and issuer initiated) with explicit cheating detection for a covertly corrupted server is vital for functional and secure digital identity systems.
Summary by alphaXiv.
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