User friction
Document uploads and selfie checks make people abandon signup, especially on platforms where privacy is the whole point.
Privacy-preserving verification for sensitive platforms
Prove trust without exposing identity.
ZKShield is verification infrastructure for dating apps, community platforms, telehealth and age-restricted services. Platforms confirm age, personhood or issuer-backed eligibility as a cryptographic proof — without collecting passports, selfies, medical records or unnecessary personal data.
Trusted issuerSigns a verifiable credential
Issuer SDK
User walletHolds the credential on-device
Wallet
PlatformVerifies only the proof
Verifier API
proof: over_18 = true · no document shared
The problem
Trust checks should not turn platforms into data vaults.
To verify a simple fact, such as an age, a real person, or a credential, platforms today collect passports, selfies and records they never wanted to hold. Every copy is friction for users and liability for the platform.
GDPR and breach exposure
Stored identity documents are a regulatory burden and a breach magnet. The safest data is the data you never collect.
Repeated verification
Users prove the same facts again and again, on every platform, re-uploading the same sensitive documents each time.
The solution
Verify the claim, not the private data.
ZKShield turns sensitive checks into yes/no cryptographic proofs. Your platform receives only the requested proof, not the data behind it.
Prove “over 18”
Confirm age eligibility without a birthdate, a passport scan, or a stored ID photo.
Prove “real person”
Confirm a unique human is behind the account without biometrics leaving the user's device.
Prove issuer-backed eligibility
Confirm membership, status or clinical eligibility signed by a trusted issuer without exposing the underlying record.
verifier receives: proof only
The verifying platform receives only the cryptographic proof it requested — not the document, record or attribute behind the claim.
How it works
Three parties. One proof. Minimal data trail.
A credential is issued once, held by the user, and proven anywhere. Each platform sees only the answer to its own question.
A trusted issuer signs a credential
A government ID provider, clinic, or organisation attests to a fact once and signs it cryptographically.
Issuer SDKThe user stores it in their wallet
The credential lives on the user's device, bound to it rather than copied into a central platform database.
User WalletThe platform verifies only the proof
Your service requests a specific claim and receives a yes/no proof, nothing more.
Verifier API
Use cases
Built for platforms where privacy is the product.
LGBTQ+ community platforms
Verify members without outing them and without keeping identity documents on file.
Dating apps
Confirm real, of-age people without storing selfies or passports.
Telehealth and clinics
Confirm patient eligibility without exposing medical records.
Events and community organisations
Admit verified members while keeping attendance private.
Age-restricted digital services
Meet age-assurance rules without becoming an ID warehouse.
Workforce and partner portals
Confirm contractor, partner or role eligibility without copying identity files.
Privacy architecture
Designed to keep sensitive data out of your platform.
Selective disclosure
Users reveal a single attribute, never the whole credential.
Zero-knowledge proof patterns
Claims are proven mathematically, without showing the data behind them.
Device-bound credentials
Credentials are tied to the holder's device to reduce copying and sharing.
No central document database
ZKShield does not need to hold user documents, reducing sensitive data exposure.
Verifier API integration
One REST call to request and validate a proof from your backend.
Validity checks without oversharing
Confirm that a credential is still trusted without revealing the underlying record.
Pilot program
Safer verification. Less data. More trust.
Start a pilot for privacy-preserving age verification, proof-of-personhood, or issuer-backed eligibility verification.
Pilot contact: hello@zkshield.io
Request pilot accessWe’ll reply with pilot scope, integration options, and issuer/verifier fit.