Question

The Vernam cipher:

a.It is a periodic substitution algorithm.
b.It forms the basis for modern Block Ciphers.
c.It is a monoalphabetic substitution algorithm.
d.It forms the basis for modern stream cipher.

Answer 1

The Vernam cipher is a monoalphabetic substitution algorithm that forms the basis for modern stream cipher.

Step-by-step explanation:

The Vernam cipher is a monoalphabetic substitution algorithm that forms the basis for modern stream cipher. Unlike a periodic substitution algorithm, the Vernam cipher uses a key that is as long as the plaintext to encrypt the message. It combines the plaintext with the key using a bitwise XOR operation to produce the ciphertext.