Secure File Transfer System

A secure file transfer implementation using Diffie-Hellman key exchange, LCG-based stream cipher, and HMAC authentication.

Features

• 🔒 End-to-end encrypted file transfer
• 🤝 Secure key exchange using Diffie-Hellman
• 🔄 Stream encryption with LCG-based cipher
• ✅ HMAC verification for data integrity
• 📦 Reliable chunked transfer with ACK mechanism

Prerequisites

• Python 3.6 or later
• Cryptography libraries:

pip install pycryptodome