Alphabet

The Polyalphabetic Cipher is a type of substitution cipher that enhances the security of traditional ciphers by introducing multiple alphabets or cipher alphabets. In this encryption technique, each letter of the plaintext is substituted with a corresponding letter from one of several different cipher alphabets, based on a secret key or keyword.

It is a phonetic alphabet that uses 26 code words.

These words are used to ensure oral communication is clearly understood.

The NATO, North Atlantic Treaty Organization, phonetic alphabet became effective in 1956 and just a few years later became the established universal phonetic alphabet.

However, it took several adaptations before the version used today came into effect.