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Zero-Knowledge Identity Verification Protocol ZKIdentity Approved by W3C: Prove Identity Without Revealing Personal Data

W3C formally approves ZKIdentity zero-knowledge identity verification protocol, allowing users to prove identity attributes such as age, nationality, and credit score without revealing any personal information.

The World Wide Web Consortium (W3C) today formally approved the ZKIdentity zero-knowledge identity verification protocol as a Web standard. Based on zero-knowledge proof cryptography, ZKIdentity allows users to prove identity attributes to service providers without revealing any personal information.

For example, users can prove they are over 18 without disclosing their birth date, prove their credit score exceeds 700 without revealing income details, or prove they hold a valid passport without exposing passport numbers.

Working group co-chair Professor Ariel Gatti of ETH Zurich said ZKIdentity standardization will fundamentally transform privacy protection on the internet. Currently, any online identity verification requires revealing extensive personal information that cannot be retracted once leaked. ZKIdentity shifts verification from disclosing information to proving attributes. Apple, Google, and Mozilla have announced built-in ZKIdentity support in their next major browser versions, with banks and e-commerce platforms planning integration within the year.