Work sheet of Information Assurance and Security
Answer the following questions accordingly and integrate to your course label
1. What are the essential ingredients of a Symmetric and Asymmetric cipher?
2. What is the difference between a block cipher and a stream cipher?
3. What is the difference between diffusion and confusion?
4. What is the difference between differential and linear cryptanalysis?
5. What is Euler’s totient function? and it’s important in computer security?
6. Why is gcd(n, n + 1) = 1 for two consecutive integers n and n + 1 ?
7. What are the roles of the public and private key?
8. Describe in general terms an efficient procedure for picking a prime number.
9. Perform encryption and decryption using the RSA algorithm
A. p = 3; q = 11, e = 7;M = 5
B. p = 5; q = 11, e = 3;M = 9
10. In a public-key system using RSA, you intercept the cipher text C = 10 sent to a user
whose public key is e = 5, n = 35.What is the plaintext M?
11. Mr. “A” has sent to Mr. “B” a cipher text as PHHW PH DIWHU using Caesar cipher
Mechanism then what will be the original message of Mr. “A”?
12. If anyone want to apply a cipher text to his friend using the Mono alphabetic Ciphers with
“n” alphabets then how many possibility does has the guy to encrypt his message?
13. What are the two general approaches to attacking a cipher?
14. What are the two problems with the one-time pad?
15. Alice want to send a Plain text of “monarchy” to Bob using play fair encryption
mechanism, then what will be the cipher message when Bob received?
“Education is a long process and infinite loop!!”.