Cryptography Library

A Python library for implementing and working with various classical encryption algorithms. This library provides a collection of ciphers that you can use to encrypt and decrypt data in educational or practical cryptography-related projects.

Features

This library includes the following classical ciphers:

• Caesar Cipher: A substitution cipher that shifts letters by a fixed number.
• Monoalphabetic Cipher: A substitution cipher where each character is replaced by another character using a key.
• Vigenere Cipher: A polyalphabetic substitution cipher that uses a keyword to encrypt data.
• Vernam Cipher: A stream cipher that uses a key of the same length as the plaintext for encryption.
• Playfair Cipher: A digraph substitution cipher that encrypts pairs of letters.
• Hill Cipher: A cipher based on linear algebra that uses matrix multiplication for encryption.

Installation

You can install this library using pip:

pip install CryptoClasec

Usage

Here’s how to use the library in your Python project:

Import the Cipher Classes

from CryptoClasec import Caesar, Monoalphabetic, Vigenere, Vernam, Playfair, HillCipher

Example: Caesar Cipher

# Initialize the Caesar cipher with a shift value of 3
caesar = Caesar(3)

# Encrypt a plaintext
encrypted = caesar.encrypt("HELLO")
print("Encrypted text:", encrypted)

# Decrypt the ciphertext
decrypted = caesar.decrypt(encrypted)
print("Decrypted text:", decrypted)

Example: Vigenere Cipher

# Initialize the Vigenere cipher with a keyword
vigenere = Vigenere("KEY")

# Encrypt a plaintext
encrypted = vigenere.encrypt("HELLO")
print("Encrypted text:", encrypted)

# Decrypt the ciphertext
decrypted = vigenere.decrypt(encrypted)
print("Decrypted text:", decrypted)

Available Classes

1- Caesar:

caesar = Caesar(3)
caesar.encrypt(plaintext)
caesar.decrypt(ciphertext)

2- Monoalphabetic:

mono = Monoalphabetic("QWERTYUIOPLKJHGFDSAZXCVBNM")
mono.encrypt(plaintext)
mono.decrypt(ciphertext)

2- Vigenere:

vigenere = Vigenere("KEY")
vigenere.encrypt(plaintext)
vigenere.decrypt(ciphertext)

4- Vernam:

vernam = Vernam("RANDOMKEY")
vernam.encrypt(plaintext)
vernam.decrypt(ciphertext)

5- Playfair:

playfair = Playfair("KEYWORD")
playfair.encrypt(plaintext)
playfair.decrypt(ciphertext)

6- HillCipher:

hill = HillCipher([[2, 3], [1, 4]])
hill.encrypt(plaintext)
hill.decrypt(ciphertext)

License

This library is licensed under the MIT License. See the LICENSE file for more information.

Contributing

Contributions are welcome! Feel free to submit issues or pull requests to improve the library.

Author

Created by Ibrahem abo kila. For any inquiries, please contact me at ibrahemabokila@gmail.com.