Decentralized E-Voting System Using Blockchain

Project Overview

The Decentralized E-Voting System is a secure, transparent, and tamper-proof voting platform designed to enhance the integrity and efficiency of elections by leveraging Blockchain Technology (Hyperledger Fabric) and a MERN Stack web interface. It aims to eliminate vulnerabilities such as vote tampering, fraud, and lack of transparency found in traditional voting systems.

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Features

• Secure Voter Authentication (OTP and JWT)
• Blockchain-based Voting with immutability
• Real-time Election Results
• Smart Contracts (Chaincode) for voting logic
• Role-Based Access Control (RBAC)
• End-to-End Encryption (AES-256)
• REST APIs
• Responsive Frontend (React.js)

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Technology Stack

Blockchain

• Hyperledger Fabric (Private, permissioned blockchain)

Web Development

• MongoDB
• Express.js
• React.js
• Node.js

Tools Used

• Docker
• Visual Studio Code
• MongoDB Compass
• Git and GitHub

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System Requirements

• Docker and Docker Compose
• Node.js (version 16+ recommended)
• Hyperledger Fabric binaries
• MongoDB

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Installation and Setup

1. Clone the Repository

• git clone https://github.com/your-repo/Decentralized-E-Voting.git
• cd Decentralized-E-Voting

2. Setup Hyperledger Fabric

• Install prerequisites
• Download Fabric samples:
  curl -sSL https://bit.ly/2ysbOFE | bash -s
• Navigate to network folder:
  cd fabric-samples/test-network
• Start the network:
  ./network.sh down
./network.sh up createChannel -c mychannel -ca

3. Deploy Chaincode

• Deploy Chaincode: ./network.sh deployCC -ccn voting -ccp ../EVoting/Evoting/chaincode/ -ccl javascript

4. Setup Web Application

• Navigate to api folder
• Install dependencies: npm install
• Start frontend server: npm run start

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Major Modules

• Voter Module

  • Registration and Authentication
  • View Elections
  • Cast Votes

• Admin Module

  • Election and Candidate Management
  • Vote Counting and Results

• Blockchain Backend

  • Smart Contracts for Voting

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API Endpoints

Method	Route	Description
POST	/loginUser	Voter login via OTP
POST	/castVote	Submit a vote
GET	/elections	Fetch list of elections
POST	/elections	Create a new election
GET	/results/:id	Fetch election results
POST	/loginElectionCommittee	Committee login

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Testing

• Unit Testing for Smart Contracts
• Integration Testing for APIs and Blockchain
• Functional Testing for User Flows
• Security Testing for authentication and encryption

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Limitations

• Requires stable internet access
• Scalability limitations for national-scale elections
• No dedicated mobile application
• Some usability challenges for non-technical users

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Future Enhancements

• Mobile Application (iOS and Android)
• Zero-Knowledge Proofs for enhanced voter privacy
• AI-based Fraud Detection
• Integration with National ID Systems
• Improved Blockchain Scalability

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References

• Hyperledger Fabric Documentation
• IBM Blockchain Platform
• Hyperledger Fabric GitHub

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