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Computer Cryptography MCQ Question with Answer

Computer Cryptography MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 22
The private key in asymmetric key cryptography is kept by

Sender
Receiver
Sender and receiver
All the connected devices to the network

Question No : 23
Which one of the following algorithms is not used in asymmetric-key cryptography?

DSA algorithm
Electronic code book algorithm
Diffie-Hellman algorithm
RSA algorithm

Question No : 24
Which is the cryptographic protocol that is used to protect an HTTP connection?

Resource reservation protocol
SCTP
TLS
ECN

Question No : 25
ElGamal encryption system is an asymmetric key encryption algorithm.

Public-key cryptography
Private-key cryptography
Both
None of these

Question No : 26
We are provided the plain text SUN. You need to convert the given plain text into ciphertext under the Ceasar cipher encryption technique. Which of the following options is the correct ciphertext for the given text if the key is 2?

UWP
NUS
WUP
QSL

Question No : 27
Which of the following cannot be chosen as a key in the Caesar cipher?

An integer
An alphabet (A-Z or a-z)
A string
None of the above

Question No : 28
Which of the following cipher techniques include the involvement of matrix operations in their algorithms of encryption and decryption?

Hill Cipher
Playfair cipher
Both a and b
None of the above

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