Question

________________ is a cipher formed out of substitution where for a given key-value the cipher alphabet for every plain text remains fixed all through the encryption procedure.

(a) Polyalphabetic Cipher

(b) Caesar Cipher

(c) Playfair Cipher

(d) Monoalphabetic Cipher

I have been asked this question in an interview for internship.

My doubt stems from Cryptography topic in division Cryptography in Security of Cyber Security

Answer 1

The correct option is (d) Monoalphabetic Cipher

To explain I would say: Monoalphabetic cipher is a cipher formed out of substitution where for a given key-value the cipher alphabet for every plain text remains fixed all through the encryption procedure.