Question

Frequency analysis can be performed on polyalphabetic ciphers which makes it weaker than monoalphabetic ciphers. explain

Answer 1

Frequency analysis can be performed on polyalphabetic ciphers making them vulnerable and weaker than monoalphabetic ciphers.

Polyalphabetic ciphers have large cipher texts as compared to the monoalphabetic ciphers as monoalphabetic ciphers are made of a single letter.

Frequency analysis is the study of group of letters in a cipher text to decode the cipher text. It is also known as counting letters.

When frequency analysis is performed on the polyalphbetic ciphers it can easily be broken by mapping the frequency of its letters.

Once their frequency is mapped, they become vulnerable to the cryptogams and can easily be decoded.