White paper WP-009
Privacy-Preserving Age Verification with Zero-Knowledge Proofs
Check someone is old enough without learning how old they are.
At a glance
- Paper
- WP-009
- Topic
- Privacy-Preserving Age Verification with Zero-Knowledge Proofs
- Format
- PDF + web summary
- Signatures
- ML-DSA-65 post-quantum (NIST FIPS 204)
- Sandbox
- Reproducible at affix-io.com/sandbox
- Company
- AffixIO, Wales, UK
Privacy-Preserving Age Verification with Zero-Knowledge Proofs is an AffixIO technical paper. Check someone is old enough without learning how old they are.
Age gates leak birthdays. AffixIO's threshold eligibility circuit proves a user meets a threshold without revealing date of birth or storing document images. Built for Online Safety Act and DSA age assurance with minimal data.
Summary
Age gates leak birthdays. AffixIO's threshold eligibility circuit proves a user meets a threshold without revealing date of birth or storing document images. Built for Online Safety Act and DSA age assurance with minimal data.
Download the full PDF for technical detail, diagrams, and reproduction steps. Public sandbox: affix-io.com/sandbox.
Related reading
Frequently asked questions
Do you store dates of birth?
No. The circuit outputs a yes/no against a configured threshold; no DOB field exists in the audit schema.
Which regulations drive demand?
UK Online Safety Act age assurance, EU Digital Services Act, and GDPR data minimisation principles.
Can proofs be reused?
Spent-proof registries prevent replay across sessions when one-time age checks are required.