A blockchain-based identity management system that links users to their ancestors, enabling encrypted, decentralized, and privacy-preserving storage and access of personal data across generations.
This project allows individuals to create unique digital identities tied to their family lineage, validated by trusted family members rather than third parties. It uses Ethereum-compatible smart contracts (Polygon), IPFS for decentralized file storage, and Zero-Knowledge Proofs (ZKPs) to protect sensitive information while allowing anonymous verification.
- 🔗 Generational Identity Linking: Every identity is connected to ancestors via a decentralized family tree structure.
- 🛡️ Zero-Knowledge Proof Authentication: Verify identities or login anonymously without exposing personal information.
- 👪 Family-Based Validation: Verified by mother, father, and grandparent (2/3 consensus required for updates).
- 🗂️ Encrypted File Storage on IPFS: Store documents, images, or data files securely and immutably.
- 🧠 Custom Validation Pool: Users revalidate every 6 months using a Q&A system; failure results in revoked rights.
- ⏳ Time-Limited Data Access: Grant data access to others for a specific period with complete control.
- 🧑💻 EVM-Compatible Smart Contracts: Built with Solidity and deployable on Polygon for scalability and cost-efficiency.
- 🕵️ Privacy-Preserving Profile Sharing: Default data visibility is restricted; unauthorized users see only avatars.
| Layer | Tech Used |
|---|---|
| Blockchain | Polygon (EVM) |
| Smart Contracts | Solidity |
| Decentralized Storage | IPFS |
| Privacy & Verification | Zero-Knowledge Proofs |
| Integration | Smart Contract ABI for platforms (e.g., eCommerce, Social Media) |
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Identity Creation Users register by submitting their data and getting verified by 3 family members (Mom, Dad, Grandparent).
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Data Storage Files are encrypted and stored on IPFS. Metadata is recorded in the smart contract.
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Validation Cycle Every 6 months, users must pass a custom Q&A validation (≥75% score). Validity lasts up to 18 months.
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Access Control Other users can request access using immutable smart contract addresses. Owners approve or reject with optional time limits.
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Decentralized Legacy Users decide which files to pass on to descendants, preserving family wisdom securely.
User ↔ Smart Contract ↔ Family Validators
↕
IPFS
↕
External Platforms (ZKP-based validation)
See diagrams in
/docs/architecture/for system models and verification flows.
- Fully decentralized identity verification
- Transparent but private data sharing
- Eliminates third-party reliance
- Immutable family tree for ancestry tracking
- Scalable and low-cost deployment with Polygon
- Initial manual verification required to bootstrap the family tree
- Complex tree updates in marriage/legal transitions
- Access permissions require manual time limits; indefinite access possible if not set
- Non-blood relationships can complicate legal accountability
- Add advanced encryption techniques for even stronger privacy
- Build user-friendly dashboards for non-technical users
- Integrate with eCommerce and Web3 platforms for seamless identity use
- Consider longer lifespan models in anticipation of extended human life expectancy