Beaufort cipher

The Beaufort cipher is a type of substitution cipher, similar to the Vigenère cipher, used for encryption and decryption of messages. It was invented by the British Admiral Sir Francis Beaufort in the early 19th century, and it operates based on a polyalphabetic substitution method. In the Beaufort cipher, a keyword is used to create a grid or tabula recta, just like in the Vigenère cipher.