Applications

What you can prove

Each use case shows exactly what's proven, who's involved, and what stays private — with example code for integration.

Use Cases

Six sovereign proofs

What you can build with LiberProof. Notarization & signed attestations are available today; zero-knowledge selective disclosure for these cases is rolling out, starting with the age threshold. Every proof reveals exactly what's stated — and nothing else.

🎂
Identity · Consumer
Age Verification
Prove you're above an age threshold — without revealing your date of birth, name, or any document.
ZK — age circuit live
Who's involved
Issuer: Government ID registry, passport authority, or verified identity provider.
Prover: You — holding a credential with your date of birth.
Verifier: Any service, website, or smart contract requiring an age gate.
What's proven
That your age satisfies a threshold (e.g., ≥ 18, ≥ 21, ≥ 65). The circuit encodes the inequality constraint. Nothing else is revealed — not your actual age, not your name, not your date of birth.
Applications
Age-gated content platforms · alcohol and tobacco retail · DeFi protocol access · online gaming · governance voting eligibility · contract execution rights.
// @liberproof/zk: generateProof({ witness: { age, minAge: 18 } })
→ proof ✓  // age circuit live · requires snarkjs + setup
🏛️
Jurisdiction · Governance
Citizenship & Jurisdiction
Prove you hold citizenship in a jurisdiction, qualifying you for services, contracts, or governance — without revealing your identity.
attest jurisdiction = verified
Who's involved
Issuer: A jurisdiction registry or equivalent authority.
Prover: A citizen holding a digitally-signed citizenship credential.
Verifier: Smart contracts, DAOs, or services requiring jurisdictional membership.
What's proven
That a valid citizenship credential exists for the stated jurisdiction. Your name, passport number, physical address, and any other attributes remain private. The verifier only learns: "this person holds citizenship in the stated jurisdiction."
Applications
DAO membership gates · governance participation · jurisdiction-specific contract eligibility · tax-residency claims · selective access to services available only to citizens.
lp.attest({ claim: { jurisdiction: 'verified' } })
→ signed attestation ✓  // name hidden · address hidden · passport hidden
💎
Finance · DeFi
Asset Threshold Proof
Prove your wallet holds above a required balance without revealing the amount — for DeFi access, collateral, or DAO membership.
prove balance > X
Who's involved
Issuer: LiberVault — signing a balance credential based on on-chain state.
Prover: A wallet holder proving their holdings without exposing their address.
Verifier: DeFi protocols, DAOs, lenders, or any service requiring collateral proof.
What's proven
That your wallet balance exceeds a threshold at a given block height. The proof commits to the balance constraint without revealing the actual balance, your wallet address, or your identity. The circuit enforces balance - threshold ≥ 0.
Applications
DeFi protocol access tiers · DAO governance voting weight · collateral proof for loans · KYC-free accredited investor verification · merit-based governance participation.
// ZK circuit rolling out: prove balance ≥ threshold
→ proof ✓  // actual balance hidden · wallet address hidden
🛂
Compliance · Privacy
KYC Without KYC
Prove you've completed identity verification once — and reuse that proof anywhere — without re-sending your documents to every service.
prove kyc_passed = true
Who's involved
Issuer: A licensed KYC provider (Onfido, Jumio, or similar) that issues a signed credential after verification.
Prover: You — holding one KYC credential reusable across all verifiers.
Verifier: Any regulated service requiring AML/KYC compliance.
What's proven
That a licensed KYC provider successfully verified your identity, at a specific date. The verifier learns only: "this person passed KYC." Your documents, name, nationality, and personal data are never re-transmitted. One verification — unlimited proofs.
Applications
Crypto exchange onboarding · regulated DeFi protocol access · financial services · cross-border service eligibility · regulated securities platforms.
lp.attest({ claim: { kycVerified: true, kycLevel: 2 } })
→ signed attestation ✓  // documents hidden · personal data hidden
🎓
Credentials · Professional
Professional Credentials
Prove you hold a valid license, degree, or certification without revealing the issuer details, your score, or any associated personal data.
prove license valid
Who's involved
Issuer: University, certification body, professional licensing board, or employer.
Prover: A credential holder proving qualification without sharing the credential document.
Verifier: Employers, platforms, DAOs, or clients requiring verified qualifications.
What's proven
That a credential from a recognized issuer is valid and not expired. The proof can optionally include claims like credential type or level without revealing the institution, graduation year, grade, or your identity. Expired credentials fail the validity check automatically.
Applications
Freelance platform verification · professional service marketplaces · DAO contributor vetting · medical licensing for telehealth · legal practice verification · engineering license attestation.
lp.attest({ claim: { credentialType: 'law_license', valid: true } })
→ signed attestation ✓  // institution hidden · grade hidden · identity hidden
🗳️
Governance · Democracy
Governance Eligibility
Prove you're eligible to vote or participate in governance — anonymous but verifiably qualified, with no linkability between votes.
prove eligible = true
Who's involved
Issuer: A governance registry or citizenship authority issuing an eligibility credential.
Prover: An eligible voter who wants to participate anonymously.
Verifier: On-chain voting contracts that enforce one-vote-per-person without tracking identities.
What's proven
That a valid eligibility credential exists, is not expired, and satisfies the governance requirements, without linking the voter to any specific vote. On the roadmap: nullifier-based double-vote prevention — each credential generating only one proof per election. Anonymous but accountable.
Applications
Parliamentary elections · DAO governance proposals · quadratic voting systems · merit-weighted voting with privacy · referenda with anonymous-but-verified turnout tracking.
lp.attest({ claim: { eligible: true } })
→ signed attestation ✓  // identity hidden · nullifier on roadmap

Own your
proof layer.

LiberProof is open source and ready to integrate. Start building privacy-preserving credentials for your sovereign systems.

GitHub Repository