sps-crypto

A Python library providing implementations of various cryptographic algorithms. This project includes classical ciphers, modern symmetric and asymmetric encryption algorithms, digital signatures, and related utilities. It is primarily intended for educational purposes and developers interested in exploring cryptography.

Note: This library is currently in Stable status (version 1.0.79).

Features

The library currently includes implementations for:

Classical Ciphers:

• Caesar Cipher
• Vigenere Cipher
• Playfair Cipher

Symmetric Encryption:

• DES (Data Encryption Standard)
• S-DES (Simplified DES)
• AES (Advanced Encryption Standard) - Currently includes MixColumns/InvMixColumns operations.

Asymmetric Encryption:

• RSA (Rivest–Shamir–Adleman)
• ElGamal Encryption System

Digital Signatures:

• RSA Digital Signature
• ElGamal Digital Signature

Key Exchange:

• Diffie-Hellman Key Exchange (including simulation of Man-in-the-Middle attack)

Utilities:

• Prime number generation and testing
• Primitive root finding
• Modular exponentiation and modular inverse
• Hashing (SHA-256 used internally for signatures)
• Text/Integer conversions for cryptographic operations

Networking:

• Basic client/server socket implementation (details in examples/sockets.py)

Installation

You can install the library using pip:

pip install sps-crypto

Requires Python version 3.6 or higher.

Usage Examples Usage examples can be found in the examples directory

Project Links GitHub Repository: https://github.com/amspsingh04/sps_crypto Bug Reports: https://github.com/amspsingh04/sps_crypto/issues

Contributing Contributions, issues, and feature requests are welcome. Please refer to the GitHub repository and issue tracker.