A zero-knowledge proof-based identity system that allows users to prove attributes about themselves without revealing underlying personal data, running on a distributed network with no central authority.
Vision
Replace traditional identity verification with cryptographic proofs - verify you’re over 21 without revealing your birthdate, prove income without showing bank statements, confirm credentials without exposing education history.
Core Features
- Zero-Knowledge Proofs: Prove facts without revealing data
- Self-Sovereign: Users control their own identity data
- Verifiable Credentials: Cryptographically signed attestations
- Privacy-Preserving: Selective disclosure of attributes
- Interoperable: Works across different platforms and jurisdictions
Technical Stack
- Blockchain: Ethereum or Polygon for credential registry
- Cryptography: zk-SNARKs for zero-knowledge proofs
- Storage: IPFS for encrypted identity documents
- Standards: W3C Verifiable Credentials, DID (Decentralized Identifiers)
Architecture
Identity Layer
- Decentralized identifiers (DIDs)
- Key management and recovery
- Biometric anchoring (optional)
Credential Layer
- Issuer registry
- Credential schemas
- Revocation lists
- Timestamp verification
Verification Layer
- Proof generation
- Proof verification
- Selective disclosure
- Predicate proofs (age > 21, income > X)
Use Cases
- Age Verification: Prove age without revealing birthdate
- Income Verification: Rent apartments or loans without bank statements
- Educational Credentials: Verify degrees without transcripts
- Healthcare: Share specific medical information with providers
- Voting: Anonymous yet verified voting systems
- Travel: Border crossing without revealing full passport data
Privacy Features
- Minimal Disclosure: Share only what’s necessary
- Unlinkability: Different verifiers can’t correlate activities
- Consent-Based: Explicit user approval for each disclosure
- Revocable: Users can revoke credentials anytime
- Auditable: Cryptographic proofs of all transactions
Challenges
- User experience vs security tradeoff
- Recovery mechanisms for lost keys
- Regulatory compliance (GDPR, KYC/AML)
- Adoption by credential issuers
- Performance of zero-knowledge proofs
Unique Innovations
- Reputation Layer: Build trust without revealing identity
- Credential Marketplace: Trade anonymized data insights
- Social Recovery: Trusted contacts can help recover access
- Progressive Disclosure: Reveal more information over time
Impact
- Restore privacy in digital interactions
- Reduce identity theft and fraud
- Enable new privacy-preserving services
- Comply with data protection regulations
- Empower individuals with data ownership