Practice Quiz in Cryptography Part 3

Online Practice Quiz in Cryptography part 3 from the book Data Communications and Networking 4th Edition by Behrouz A. Forouzan.

Practice Quiz in Cryptography

This is the Online Practice Quiz in Cryptography part 3 from the book, Data Communications and Networking 4th Edition by Behrouz A. Forouzan. If you are looking for a reviewer in Electronics Systems and Technologies (Communications Engineering) this will definitely help you test your knowledge and skill before taking the Board Exam.

Continue Part III of the Online Practice Quiz

Quiz in Cryptography

Question 21. The ________ is the message after transformation.

A. ciphertext

B. plaintext

C. secret-text

D. None of these


Question 22. The _________ attack can endanger the security of the Diffie-Hellman method if two parties are not authenticated to each other.

A. man-in-the-middle

B. ciphertext attack

C. plaintext attack

D. None of these


Question 23. The ________is the original message before transformation.

A. ciphertext

B. plaintext

C. secret-text

D. None of these


Question 24. ECB and CBC are ________ ciphers.

A. block

B. stream

C. field

D. None of these


Question 25. A(n) ______ algorithm transforms ciphertext to plaintext.

A. encryption

B. decryption

C. either (a) or (b)

D. neither (a) nor (b)


Question 26. In a(n) ________ cipher, a pair of keys is used.

A. symmetric-key

B. asymmetric-key

C. either (a) or (b)

D. neither (a) nor (b)


Question 27. The _______ is a number or a set of numbers on which the cipher operates.

A. cipher

B. secret

C. key

D. None of these


Question 28. DES is a(n) ________ method adopted by the U.S. government.

A. symmetric-key

B. asymmetric-key

C. either (a) or (b)

D. neither (a) nor (b)


Question 29. A modern cipher is usually a complex _____cipher made of a combination of different simple ciphers.

A. round

B. circle

C. square

D. None of these


Question 30. AES has _____ different configurations.

A. two

B. three

C. four

D. five


Question 31. ________ DES was designed to increase the size of the DES key.

A. Double

B. Triple

C. Quadruple

D. None of these

More Practice Quiz in Cryptography

Practice Quiz Part 1

Practice Quiz Part 2

Practice Quiz Part 3

Complete Practice Quiz in Data Communications and Networking

Note: After taking this particular quiz, you can proceed to check all the topics.


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