ECDH Key Exchanger

Overview

ECDH Key Exchanger is a Python library that implements the Elliptic Curve Diffie-Hellman (ECDH) cryptographic protocol for secure key exchange, combined with ChaCha20Poly1305 for message encryption and decryption. It ensures secure communication by generating a shared secret between two parties without transmitting the secret over the network.

Features

• Secure Key Exchange: Utilizes the SECP521R1 elliptic curve for robust ECDH key exchanges.
• Encryption and Decryption: Employs ChaCha20Poly1305 AEAD for encrypting and decrypting messages, ensuring data integrity and confidentiality.
• Performance Logging: Measures and logs the duration of cryptographic operations, which helps in performance tuning and debugging.
• Detailed Debugging Output: Logs all cryptographic operations in detail, both to console and to a dedicated log file (ecdhtest.log), aiding in troubleshooting and educational purposes.
• Error Handling: Gracefully handles errors, including improper decryption attempts, with comprehensive logging for each scenario.

Requirements

• Python 3.x
• Cryptography library version 2.8 or higher

Usage

To use the ECDH Key Exchanger library, you need to initialize an instance of the SecureECDH class and call the ecdh_process method to perform the key exchange and message encryption/decryption. Here is a quick example:

from ecdh_key_exchanger import SecureECDH

# Initialize the SecureECDH object
ecdh = SecureECDH()

# Perform the ECDH process
ecdh.ecdh_process()

# Results and logs can be viewed in the console and in ecdhtest.log