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.
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. Question 3. DES uses a key generator to generate sixteen _______ round keys. Question 4. The Caesar cipher is a _______cipher that has a key of 3. Question 5. _________ ciphers can be categorized into two broad categories: monoalphabetic and polyalphabetic. Question 6. The _______ cipher is the simplest monoalphabetic cipher. It uses modular arithmetic with a modulus of 26.
Question 7. DES has an initial and final permutation block and _________ rounds. Question 8. In a(n) ________, the key is called the secret key. Question 9. A(n) _______ algorithm transforms plaintext to ciphertext. Question 10. The DES function has _______ components.