Protect your sensitive information with these historical cipher algorithms. While these methods are not suitable for modern high-security needs, they provide excellent learning tools for cryptography basics and can be useful for simple obfuscation needs.
The Caesar cipher is one of the simplest and most widely known encryption techniques. It works by shifting each letter in the plaintext by a fixed number down the alphabet.
The Vigenère cipher is a method of encrypting alphabetic text by using a simple form of polyalphabetic substitution. It uses a keyword to determine which alphabet to use for each letter.
Caesar Cipher: Named after Julius Caesar, who used it in his private correspondence, this cipher is a type of substitution cipher where each letter in the plaintext is shifted a certain number of places down the alphabet. While extremely easy to break, it's a great introduction to cryptography concepts.
Vigenère Cipher: This method was considered secure for centuries (the "unbreakable cipher") until Charles Babbage broke it in the 19th century. It works by using a keyword to shift letters, making frequency analysis more difficult than with simple substitution ciphers.
Note: These tools are for educational purposes and basic obfuscation only. For modern secure encryption, please use AES or other contemporary algorithms.