🔐 eVault – Blockchain-Based Evidence Verification System

eVault is a decentralized platform that securely stores and verifies digital evidence (signatures, documents, images) using Ethereum blockchain, IPFS, and Machine Learning. Designed for legal professionals to ensure digital proof integrity.

PRESENTATION : https://youtu.be/hqvCjngK--c?si=_vE-fFXHf0ztFkPN LIVE DEMO : https://youtu.be/kedkmKf02FU?si=FWdhkbQS1RpSZ23a

Key Features

• 🛡️ Blockchain-Verified Storage: Immutable evidence records on Ethereum
• 🔍 AI Signature Authentication: ML-powered forgery detection
• 🌐 IPFS Hosting: Tamper-proof distributed file storage
• 📄 Smart Evidence Viewer: Secure document access with hash verification
• 🔐 End-to-End Encryption: Military-grade cryptographic protection

Who It's For

• Legal Professionals: Lawyers, judges, and investigators needing evidence authentication
• Forensic Teams: Digital evidence verification specialists
• Government Agencies: Secure document archiving and retrieval
• Corporate Compliance: Contract and agreement validation

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Tech Stack

Component	Technology
Blockchain	Ethereum, Solidity, Hardhat
Frontend	React.js, Material-UI
Storage	IPFS (via Pinata)
Machine Learning	Python, OpenCV, Scikit-learn
Cryptography	SHA-256, Digital Signatures

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Folder Struture

eVault/
├── client/ # Frontend (React)
│ ├── public/ # Static files
│ └── src/ # React source code
├── contracts/ # Solidity smart contracts
│ ├── Upload.sol
│ └── cryptography/ # Cryptographic utilities
├── Features/ # Signature verification logic
│ ├── Testing/ # Test signature samples
│ └── Training/ # Model training data
├── forged/ # Forged signature data
├── real/ # Real signature data
├── TestFeatures/ # Testing ML features
├── scripts/ # Hardhat scripts
├── project.ipynb # Jupyter notebook for ML experiments
├── project.py # Backend logic for ML
├── hardhat.config.js # Hardhat configuration
├── package.json # Node.js dependencies
├── .gitignore
└── README.md

🚀 How to Run This Project

Prerequisites

• Node.js v18+
• Python 3.10+
• MetaMask (Browser Extension)
• Git
• Yarn/npm

Installation

1. Clone the repository:

   git clone https://github.com/SakshamAngirash/Major-Project.git
   cd eVault

2. Install frontend dependencies:

   cd ..
   npm install  # or yarn install

3. Install Python dependencies:

   pip install -r requirements.txt

Configuration

# Blockchain
ETHEREUM_RPC_URL=http://localhost:8545
PRIVATE_KEY=your_wallet_private_key

# IPFS
IPFS_API_KEY=your_pinata_api_key
IPFS_SECRET_API_KEY=your_pinata_secret

# ML Server
ML_API_PORT=5000

Configuration

# Blockchain
ETHEREUM_RPC_URL=http://localhost:8545
PRIVATE_KEY=your_wallet_private_key

# IPFS
IPFS_API_KEY=your_pinata_api_key
IPFS_SECRET_API_KEY=your_pinata_secret

# ML Server
ML_API_PORT=5000

Running the Project

1. Start local Ethereum node (in separate terminal):

    npx hardhat node

2. Deploy smart contracts (in new terminal):

   npx hardhat run scripts/deploy.js --network localhost

3. Launch frontend (in new terminal):

   cd client
   npm start