crYpt-pr 0.0.2

some methods about classical code

Encryption Algorithms Module

This directory contains implementations of several classic encryption algorithms. Below is a brief description of each file:

File Descriptions

__init__.py

• This file marks the current directory as a Python package.

caesar.py

• Implements the Caesar Cipher encryption algorithm.
• Caesar Cipher is a simple substitution cipher that encrypts text by shifting letters in the alphabet by a fixed number of steps.
• Functions: Caesar_encode(plaintext: str, key: int) -> str: Encrypts the given plaintext using the specified key. plaintext: The input string to be encrypted. key: The number of positions to shift each letter.
• Caesar_decode(ciphertext: str) -> dict: Attempts to decrypt the ciphertext by trying all possible keys. ciphertext: The encrypted string to be decrypted.

Playfair.py

• Implements the Playfair Cipher encryption algorithm.
• Playfair Cipher is an encryption method based on a letter matrix, commonly used to encrypt text.
• Functions: Playfair_encode(Keyword: str, Plaintext: str) -> str: Encrypts the plaintext using the Playfair cipher. Keyword: The encryption key used to generate the matrix. Plaintext: The input string to be encrypted.
• Playfair_decode(Keyword: str, ciphertext: str) -> str: Decrypts the ciphertext using the Playfair cipher. Keyword: The encryption key used to generate the matrix. ciphertext : The encrypted string to be decrypted

Vigenere.py

• Implements the Vigenère Cipher encryption algorithm.
• Vigenère Cipher is a polyalphabetic substitution cipher that uses a key to determine the shift for each letter.
• functions: Vigenere_encode(Plaintext: str, m: int, keyword: str) -> str: Encrypts the plaintext using the Vigenère cipher. Plaintext: The input string to be encrypted. m: The length of the keyword. keyword: The encryption key.
• Vigenere_decode(ciphertext: str,m: int, keyword: str) -> str : Decrypts the ciphertext using the Vigenere cipher. ciphertext : The encrypted string to be decrypted. m: The length of the keyword. keyword: The encryption key.

Usage

1. Import the modules:

   from crYpt import caesar, Playfair, Vigenere
   

2. Call the corresponding functions to encrypt or decrypt.

Notes

• Ensure that the input text and key meet the requirements of each algorithm.
• For detailed usage instructions, refer to the comments in each file.