piyushbhangale / message-encoder-decoder Goto Github PK

Vigenere Cipher is a method of encrypting alphabetic text. It uses a simple form of polyalphabetic substitution. A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets .The encryption of the original text is done using the Vigenère square or Vigenère table.

Encryption
The the plaintext(P) and key(K) are added modulo 26.
Ei = (Pi + Ki) mod 26

Decryption
Di = (Ei - Ki + 26) mod 26

• Tkinter -> GUI toolkit
• time
• datetime
• base64 -> Vigenère cipher