Google open-sources Zero-Knowledge Proof libraries
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- Google open-sourced its Zero-Knowledge Proof (ZKP) libraries, fulfilling a prior promise and extending its partnership with Sparkasse to support EU age assurance.
- ZKP technology lets users prove a single fact about themselves — such as being over 18 — without exchanging any other personal data.
- The open-source release targets four stakeholder groups: web/app users gain a more private digital ecosystem, businesses get a ready privacy-compliance tool, developers can build on the codebase, and researchers access a more efficient ZKP implementation.
- The EU's eIDAS Regulation, set to take effect in 2026, encourages Member States to integrate privacy-enhancing technologies like ZKP into the European Digital Identity Wallet ("EUDI Wallet").
- Google positioned its ZKP codebase as integration-ready for those future EUDI Wallets, publishing the code at github.com/google/longfellow-zk.
Why it matters: With the EU's eIDAS Regulation taking effect in 2026, Google's free open-source ZKP toolkit gives Member States a ready-built component for the EUDI Wallet deadline, letting businesses, developers, and governments build age-verification and identity applications without proprietary dependencies or custom cryptography work.
