zkTLS: Zero-Knowledge Transport Layer Security

Overview

zkTLS is a proof-of-concept implementation of a Transport Layer Security (TLS) protocol with zero-knowledge elements. It combines traditional TLS handshake procedures with Multi-Party Computation (MPC) and Garbled Circuits to enhance privacy and security.

Features

• TLS-like handshake protocol
• Garbled Circuit implementation for secure computation
• Oblivious Transfer (OT) protocol
• Multi-Party Computation (MPC) for key derivation
• Secure communication using AES-GCM encryption

Project Structure

• garbled_circuit.py: Implementation of the Garbled Circuit
• oblivious_transfer.py: Implementation of the Oblivious Transfer protocol
• mpc_party.py: Multi-Party Computation party and handshake
• tls_handshake.py: TLS handshake implementation
• secure_communication.py: Secure communication using derived keys
• main.py: Entry point for running the client or server

Requirements

• Python 3.7+
• cryptography library

Installation

1. Clone the repository:

   git clone https://github.com/yourusername/zkTLS.git
   cd zkTLS
   

2. Install the required dependencies:

   pip install cryptography
   

Usage

To run the server:

python main.py server

To run the client:

python main.py client

Security Considerations

This is a proof-of-concept implementation and should not be used in production environments. It lacks many security features of a full TLS implementation, including:

• Complete certificate chain validation
• Support for multiple cipher suites
• Session resumption
• Perfect forward secrecy
• Protection against various attacks (e.g., padding oracle, timing attacks)

Contributing

Contributions to improve the implementation or add features are welcome. Please submit a pull request or open an issue to discuss proposed changes.

License

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

Disclaimer

This implementation is for educational purposes only and should not be used in production systems or to protect sensitive information.