Sharebnb - Decentralized Data Storage Platform

ShareVault is a decentralized platform that allows users to securely store, share, and retrieve encrypted data, leveraging blockchain technology, Zero-Knowledge Proofs (ZKPs), and decentralized storage systems like IPFS/Filecoin. The platform ensures data privacy, integrity, and decentralization, enabling fair compensation for storage providers.

Key Features:

• Encrypted Fragmentation: Files are split and encrypted for secure storage.
• Zero-Knowledge Proofs: Proves storage integrity without exposing file content.
• Blockchain Integration: Metadata storage and payment systems are powered by Ethereum/Polygon.
• Decentralized Storage: Utilizes IPFS/Filecoin for data storage across multiple nodes.
• Fair Compensation: Storage providers earn cryptocurrency for hosting data.

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🚀 Overview

ShareVault facilitates the sharing of encrypted data in a secure, decentralized manner. Users can upload files, which are split into encrypted fragments and stored across distributed nodes. Zero-Knowledge Proofs (ZKPs) are used to verify that data is stored correctly without revealing the contents. The platform is built with a frontend powered by React.js, Next.js, and a backend using Node.js and Ethereum/Polygon for blockchain integration.

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🛠️ Technology Stack

• Frontend: React.js, Next.js
• Backend: Node.js
• Blockchain: Ethereum, Hardhat, Solidity Smart Contracts
• Storage Layer: IPFS/Filecoin
• Zero-Knowledge Proofs: zk-SNARKs/zk-STARKs
• Data Encoding: Reed-Solomon Codes

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🌟 Features

• Data Upload and Fragmentation: Files are split into encrypted fragments using erasure coding techniques.
• Proof of Storage: Nodes use ZKPs to prove they store data fragments securely.
• Decentralized Data Retrieval: Encrypted fragments are retrieved from the network and reassembled.
• Smart Contracts for Payments: Storage providers are compensated via Ethereum/Polygon-based smart contracts.

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⚙️ Setup

Prerequisites

• Node.js (for the backend)
• npm and bun (for package management)
• Hardhat (for smart contract deployment)

Installation Steps

1. Clone the Repository:

   git clone https://github.com/your-username/sharevault.git
   cd sharevault

2. Install Dependencies:

   npm install
   bun install

3. Configure Hardhat Project:

   • Update hardhat.config.js with your blockchain network details.

4. Deploy Smart Contracts:

   npx hardhat run scripts/deploy.js --network <network-name>

5. Start the Client:

   bun run dev

6. Start the Server:

   bun run dev

7. Run the Blockchain:

   npx hardhat node

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🧩 How It Works

1. File Upload: Users upload their files, which are split into encrypted fragments.
2. Fragment Distribution: The encrypted fragments are distributed across decentralized storage nodes (IPFS/Filecoin).
3. Proof of Storage: Storage nodes prove they store the fragments securely via Zero-Knowledge Proofs (ZKPs).
4. Data Retrieval: Users retrieve the encrypted fragments, which are reassembled and decrypted.
5. Payment Mechanism: Storage providers are compensated with cryptocurrency for their contributions.

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🛡️ Security

ShareVault uses advanced security measures to protect data:

• AES Encryption: Encrypts data fragments to ensure only authorized users can access them.
• Zero-Knowledge Proofs: Validates storage integrity without revealing the actual data.
• Smart Contracts: Ensure tamper-proof metadata management and seamless payment processing.

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📈 Future Enhancements

• Scalability: Incorporate advanced zk-STARKs for better performance with larger datasets.
• Mobile Support: Develop cross-platform mobile applications to access ShareVault on the go.
• Real-Time Monitoring: Add advanced monitoring features for enhanced data availability and redundancy.

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📁 Project Structure

Client-Side Code:

• app/: Contains the main application code, API routes, frontend pages, and libraries like circom (ZKP related files).
• ui/: Reusable UI components like buttons, alerts, and inputs.
• public/: Static files including SVGs and cryptographic files for ZKPs.

Server-Side Code:

• pages/api/: Contains API routes for Ethereum interaction (ethProxy.ts), data fetching (fetchData.ts), and storing data (storeData.ts).
• app/: Server-side logic and ZKP-related libraries.

Blockchain:

• contracts/: Solidity smart contracts for data commitment storage and locking.
• scripts/: Deployment scripts for the blockchain.

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💻 Contributors

• Kshitij Kota
• Pranav Hemanth
• Pranavjeet Naidu
• Sampriti Saha

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📜 License

This project is licensed under the MIT License. See the LICENSE file for details.