CP-ABE-LWE-Based-Smart-Contract

Privacy-Preserving E-Health Record Management Using Blockchain-Based Post-Quantum Access Control https://ieeexplore.ieee.org/document/10794736 doi:10.1109/UNet62310.2024.10794736

CP-ABE-LWE-Based-Smart-Contract

Project Title: Privacy-Preserving E-Health Record Management Using Blockchain-Based Post-Quantum Access Control
DOI: 10.1109/UNet62310.2024.10794736

This project implements a smart contract for a Ciphertext-Policy Attribute-Based Encryption (CP-ABE) scheme based on Learning With Errors (LWE), designed for secure e-health record management on a blockchain. It utilizes post-quantum cryptographic principles for access control.

Prerequisites

Before testing the project, ensure the following software is installed:

1. Node.js: Version 18.12.0 (LTS) is required. Download and install it from the official release page: https://nodejs.org/en/blog/release/v18.12.0.
2. npm: Update npm to the latest version using npm install -g npm.
3. node-gyp: Install node-gyp globally using npm install -g node-gyp.
4. Ganache: A personal Ethereum blockchain for development and testing. Download it from: https://archive.trufflesuite.com/ganache/.
5. Truffle Suite: The project is built and tested using the Truffle framework. Install Truffle globally using npm install -g truffle.
6. Python Packages (for AccessControl.py): Install the required Python packages:

   pip install flask numpy sympy requests json-tricks flask_restful web3

Smart Contract Testing and Deployment

Follow these steps to compile, deploy, and test the smart contracts:

1. Compilation: Navigate to the project's root directory (CP-ABE-LWE-Based-Smart-Contract-main\CP-ABE-LWE-Based-Smart-Contract-main) and compile the smart contracts using Truffle:

   truffle compile

2. Deployment:
   • Launch Ganache.
   • Configure your Truffle project (typically in truffle-config.js) to connect to your local Ganache network (usually localhost:7545).
   • Deploy the compiled contracts to the Ganache blockchain:

     truffle deploy

3. Testing: Execute the Truffle tests to verify the smart contract functionality:

   truffle test

Ganache Configuration

Steps:

1. Open Ganache and go to CHAIN tab
2. Set Hardfork to Petersburg
3. Set Gas Price to 1 WEI
4. Save and restart

Result: Petersburg hardfork with minimal gas costs for development testing.

Flask API Script (AccessControl.py)

Remember to update the contract address in AccessControl.py with your contract's address.

1. Execution: Run the script using Python from the command line:

   python AccessControl.py

   (Note: Use py if it's aliased for Python on your system, as in the original text).
2. Access: Once running, the API will be accessible at http://127.0.0.1:5000.