Disadvantages of Monoalphabetic Cipher
- Monoalphabetic ciphers are easy to break because they reflect the frequency data of the original alphabet.
- Prone to guessing attack using the English letters frequency of occurrence of letters.
- The English Language is used so the nature of plain text is known.
- Less secure than a polyalphabetic cipher.
What is Monoalphabetic Cipher?
Monoalphabetic Cipher is a part of the substitution technique in which a single cipher alphabet is used per message (mapping is done from plain alphabet to cipher alphabet). Monoalphabetic cipher converts plain text into cipher text and re-convert a cipher text to plain text. Monoalphabetic Cipher eliminates the brute-force techniques for cryptanalysis. Moreover, the cipher line can be a permutation of the 26 alphabetic characters.
In Cryptography, various encryption techniques are used to provide data security. The classical Encryption technique is categorized into two divisions: