Decentralized Identity Verification System (Blockchain-Based)

Overview

The Decentralized Identity Verification System is a blockchain-based identity management solution that allows users to register, update, and verify their identities in a secure, transparent, and tamper-proof manner. It eliminates reliance on centralized authorities, providing a trustless and immutable identity system.

This system is built on Ethereum-compatible blockchains using Solidity smart contracts, ensuring decentralized identity verification with admin and verifier roles for enhanced security and governance.

Features

🛡 User Identity Management

✔ Register Identity – Users can register their identity by providing details such as name, date of birth, email, and phone number.
✔ Update Identity – Users can update their identity details if necessary.
✔ Revoke Identity – A user can revoke their identity at any time.

✅ Identity Verification

✔ Verify Identity – Authorized verifiers (or admin) can verify a user’s identity to confirm authenticity.
✔ Admin Revocation – The admin can revoke an identity if fraudulent activity is detected.
✔ Identity Status – Each identity has a verification status (Verified/Not Verified) and revocation status for enhanced security.

🔐 Security & Governance

✔ Admin Control – The admin has privileges to verify, revoke, and assign verifier roles.
✔ Verifier Role Management – Admins can add or remove verifiers who help in identity verification.
✔ Time Stamping – The system records registration and update timestamps to track modifications.
✔ Blockchain Transparency – Immutable records ensure tamper-proof identity storage.

How It Works

1. User Registration

   • A new user registers their identity by submitting their personal details.

   • Their identity is stored on the blockchain, but remains unverified initially.

2. Identity Verification

   • A trusted verifier or admin verifies the identity.

   • Once verified, the identity status changes to “Verified”.

3. Identity Updates & Revocation

   • Users can update their information if needed.

   • Users can also revoke their identity, making it invalid.

   • The admin can revoke identities if fraudulent activities are detected.

4. Admin & Verifier Management

   • The admin can add or remove verifiers to delegate verification responsibilities.

   • The admin can also transfer control to another admin securely.

Technologies Used

🔹 Solidity – Smart contract programming for Ethereum-based blockchains.
🔹 Ethereum Virtual Machine (EVM) – Smart contract execution environment.
🔹 MetaMask / Web3.js / Ethers.js – For frontend interaction with smart contracts.
🔹 IPFS / Decentralized Storage (Optional) – For storing additional identity proofs securely.

Use Cases

💳 KYC (Know Your Customer) – Secure onboarding for banks and financial institutions.
🏥 Healthcare – Digital health records with verified identities.
🌍 Governance – Digital voting systems with verified citizen identities.
🎓 Education – Issuing blockchain-based certificates for students.