HACKING PROJECT · crypto · Advanced
Zero-Knowledge Identity Verification Module
Enable users to prove identity attributes to a verifier using zero-knowledge proofs without disclosing the underlying personal data.
Traditional identity verification forces users to over-share sensitive data — full date of birth, address, ID scans — creating honeypots of PII and violating data-minimization principles. Users cannot currently prove a claim ("I am over 18", "I am a verified resident", "I am not sanctioned") without exposing the underlying data. This gap between proving eligibility and protecting privacy undermines both regulatory compliance (GDPR data minimization) and user trust.
**What you'll build**
Build a privacy-preserving identity module using zero-knowledge proofs and verifiable credentials (W3C VC/DID) that lets a user prove selective attributes to a verifier without revealing the raw data. Implement a ZK circuit for a real predicate (e.g., age ≥ 18 from a signed credential, or set-membership in an allowlist), issue verifiable credentials from a trusted issuer, and provide an on-chain or off-chain verifier that checks the proof and credential signature. Align with self-sovereign identity (SSI) and NIST 800-63 identity assurance concepts.
**Objective** — Enable users to prove identity attributes to a verifier using zero-knowledge proofs without disclosing the underlying personal data.
**Expected outcome** — A working ZK identity module (issuer + holder wallet + verifier) that proves a selective-disclosure predicate such as age-over-18 from a verifiable credential.
**Difficulty** — Expert — combines ZK circuit design, verifiable-credential/DID standards, cryptographic signing, and privacy-by-design architecture.
**Primary category** — Privacy Engineering / IAM; Secondary = Applied Cryptography, Decentralized Identity, Compliance
**Security domains** — Primary = Security Research; Secondary = GRC, Cloud Security, AppSec, IAM
**Technical focus** — Zero-knowledge proofs, selective disclosure, W3C Verifiable Credentials/DIDs, self-sovereign identity, BBS+/anonymous credentials, predicate proofs (range/set-membership), privacy-by-design, digital signatures
**Core technologies** — Languages: Circom, TypeScript, Rust, Solidity; Frameworks/Libraries: snarkjs, circomlib, Semaphore, Iden3/Polygon ID, Hyperledger Aries, DID libraries; Security Tools: EdDSA/BBS+ signing, DID resolvers; Cloud/Infra: Node.js, Docker, EVM/testnet; AI/Data: N/A; Databases: encrypted credential store / holder wallet storage
**Where it's valued** — Digital identity, fintech/KYC, healthcare, government eID, Web3 reputation, regulated onboarding, age-verification
**Careers it builds toward** — Identity/IAM Engineer, Privacy Engineer, Applied Cryptography Engineer, Decentralized Identity Developer, Security Researcher
**Framework alignment**
• MITRE ATT&CK: N/A (privacy/identity-assurance protocol, not adversary TTPs); mitigates credential-theft impact by minimizing exposed PII.
• NIST CSF 2.0: Protect (data minimization, access control, cryptography), Govern (privacy policy), Identify
• OWASP: Identification & Authentication Failures (A07), Cryptographic Failures (A02); MASVS for mobile wallet holder app
• CIS Controls v8: 3 Data Protection, 6 Access Control Management, 5 Account Management
**Innovation** — Startup Potential / Research-Level — privacy-preserving verifiable identity (Polygon ID, zkPass, World ID) is an active frontier with clear regulatory tailwinds. Scores: Innovation 9/10, Startup 8/10, Enterprise-Readiness 6/10, Patent = Possible.