UGC NET CSE | December 2019 | Part 2 | Question: 25

Question

Which of the following is not needed by an encryption algorithm used in Cryptography?

• A. $\text{KEY}$
• B. Message
• C. Ciphertext
• D. User details

Answer 1

For any encryption algorithm the ciphertext is

$ciphertext=f(plaintext,key)$

i.e ciphertext is function of key and plaintext and is not dependent on the userdetails, therefore D is the correct option