Alberti cipher
The Alberti cipher, created by Leon Battista Alberti in the 15th century, is recognized as one of the earliest examples of a polyalphabetic substitution cipher. Alberti, an Italian Renaissance polymath, developed this cipher as a response to the need for stronger, more secure encryption methods that could withstand frequency analysis, a technique that had become effective against simpler monoalphabetic ciphers.
Affine Cipher
The Affine cipher is a type of substitution cipher rooted in modular arithmetic, which falls under the category of monoalphabetic ciphers. It has origins in classical cryptography, dating back to the use of basic substitution techniques by ancient civilizations.
A1Z26 Cipher
The A1Z26 cipher, also known as the letter-number cipher or the alphabet cipher, is a simple substitution cipher where each letter of the alphabet is replaced with its corresponding position number.
In the A1Z26 cipher:
The letter A is represented by the number 1.
The letter B is represented by the number 2.
The letter C is represented by the number 3.