This tool allows you to encode or decode text using the Vigenère Cipher, a method used for secure communication. It's suitable for students, educators, and cryptography enthusiasts.
All calculations are based on the principles of the Vigenère Cipher, a well-documented cryptographic method.
The Vigenère Cipher uses a simple form of polyalphabetic substitution. Each letter in the text is shifted along the alphabet by a number of positions determined by a corresponding letter in the repeating key.
Consider encoding the word "HELLO" with the key "KEY". The first letter, H, is shifted by the position of K in the alphabet, and so forth.
A method of encrypting alphabetic text by using a simple form of polyalphabetic substitution.
The key can be any word or phrase. The longer and more random the key, the more secure the cipher.
Yes, especially with short keys. Longer keys improve security.
This tool is for educational purposes. Do not use it for sensitive information.
Ensure that the key and text are correctly entered, and that the mode is set appropriately.