Practice Quiz in Cryptography Part 1

This is the Online Practice Quiz in Cryptography part 1 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.

Start Part I of the Online Practice Quiz

Quiz in Cryptography Question 1. In an asymmetric-key cipher, the sender uses the__________ key. A. private B. public C. either (a) or (b) D. neither (a) nor (b) Question 2. A(n) ______ is a keyless substitution cipher with N inputs and M outputs that uses a formula to define the relationship between the input stream and the output stream. A. S-box B. P-box C. T-box D. None of these Question 3. DES uses a key generator to generate sixteen _______ round keys. A. 32-bit B. 48-bit C. 54-bit D. 42-bit Question 4. The Caesar cipher is a _______cipher that has a key of 3. A. transposition B. additive C. shift D. None of these Question 5. _________ ciphers can be categorized into two broad categories: monoalphabetic and polyalphabetic. A. Substitution B. Transposition C. either (a) or (b) D. neither (a) nor (b) Question 6. The _______ cipher is the simplest monoalphabetic cipher. It uses modular arithmetic with a modulus of 26. A. transposition B. additive C. shift D. None of these Question 7. DES has an initial and final permutation block and _________ rounds. A. 14 B. 15 C. 16 D. None of these Question 8. In a(n) ________, the key is called the secret key. A. symmetric-key B. asymmetric-key C. either (a) or (b) D. neither (a) nor (b) Question 9. A(n) _______ algorithm transforms plaintext to ciphertext. A. encryption B. decryption C. either (a) or (b) D. neither (a) nor (b) Question 10. The DES function has _______ components. A. 2 B. 3 C. 4 D. 5

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.

Complete Practice Quiz in Data Communications and Networking

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