PRIVACY · ZERO-KNOWLEDGE
Google Longfellow ZK verifies only age_over_18. We never collect your name, address, or full date of birth.
1. Signup block
Users under 14 are rejected at signup via date-of-birth verification (terms Art. 23).
2. Youth gates
Ages 14–18 are flagged isMinor: stronger filters, adult features blocked, guardian consent for paid use.
3. ZK adult assurance
Adults may optionally prove 18+ with Google Longfellow ZK — no DOB or legal name disclosed.
Privacy boundary
✓
Whether you are 18+ (age_over_18)
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Name · full DOB · address · raw mDoc / ID payload
On Chrome with Digital Credentials API, the wallet produces an mDoc ZK proof. EU users: dc+sd-jwt PID path supported.
Google Longfellow ZK — Apache-2.0 open source (github.com/google/longfellow-zk)ZK age assurance does not replace signup blocking. Under-14 rejection uses self-reported birth date as the first gate. Internal fixture paths are not offered to end users.
Last reviewed: 2026-07-06