All news with #zero-knowledge proofs tag

Policy, Privacy, and Post-Quantum Anonymous Credentials

🔒 Lena Heimberger examines the challenge of building post-quantum Anonymous Credentials that are practical for large-scale use. The post summarizes real-world needs — from the EU digital identity wallet to Cloudflare’s Privacy Pass rate-limiting — and defines key requirements like unlinkability, unforgeability, round-optimality, and per-origin rate limits. It surveys PQ approaches (generic ZKP composition, lattice-based signatures, hash-and-sign with aborts, and MPC-in-the-head/VOLEitH), evaluates trade-offs in bandwidth and latency, and calls for standardized ZK-friendly hashes and PQ-native protocol designs.

Google Open-Sources ZKP Libraries for Age Assurance

🛡️ Google has open sourced its Zero-Knowledge Proof (ZKP) libraries to accelerate privacy-preserving digital ID and age-assurance solutions. Developed with Sparkasse, the release enables people to prove attributes (for example, that they are over 18) without sharing any other personal data. By making a performant ZKP codebase available, Google aims to help developers, researchers, businesses, and governments integrate privacy-first flows, including use cases for the European EUDI Wallet.

Sparkasse Partners with Google for EU Age Assurance

🔐 Google and Germany’s Sparkasse announced a wallet-based EU age assurance service that lets customers prove age online without sharing personal data. Using the Credential Manager API, Google Wallet and zero-knowledge cryptography, Sparkasse will issue trusted credentials across its network of 343 regional savings banks serving 50 million customers. Integration with Android and Chrome enables one-click age checks for apps and sites and will roll out in the coming months.

Secure Age Assurance for Europe and Global Internet

🔒 Google outlines a privacy-forward approach to online age assurance that emphasizes interoperability and targeted protections for children, teens, and parents. The post highlights the new Credential Manager API on Android, which enables sites and apps to request only necessary age information from trusted credential holders. Backed by zero-knowledge proofs, the system can verify age thresholds (for example, over 18) without exposing identity or additional personal data. Google urges standards development and cross-sector collaboration to extend and adopt this secure infrastructure.