Vigenere-Decoder

The Vigenère Cipher Decoder is a Python tool designed to decrypt Vigenère cipher text efficiently, utilizing known plaintext or flag formats to significantly reduce decryption time. Key features include an interactive menu for input, command line argument support for flexibility, and a brute force capability for discovering possible keys. This decoder is particularly useful for cybersecurity professionals engaged in cryptanalysis and CTF (Capture The Flag) challenges.