CS1355 Cryptography & Network Security Question Bank : kings.ac.in
Name of the College : Kings College Of Engineering
Department : Computer Science & Engineering
Subject : Cryptography & Network Security
Website : kings.ac.in
Document Type : Question Bank
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/ki…in/286-CNS.pdf
Kings Cryptography Question Paper
FUNDAMENTALS :
UNIT I
PART-A : (2 MARKS)
1. Specify the four categories of security threats?
Related : Kings College Of Engineering CS2253 Computer Organization & Architecture Question Bank : www.pdfquestion.in/273.html
2. Explain active and passive attack with example?
3. Define integrity and non repudiation?
4. Differentiate symmetric and asymmetric encryption?
5. Define cryptanalysis?
6. Compare stream cipher with block cipher with example.
7. Define security mechanism
8. Differentiate unconditionally secured and computationally secured .
9. Define steganography
10. Why network need security?
11. Define Encryption
12. Specify the components of encryption algorithm.
13. Define confidentiality and authentication Confidentiality.
14. Define cryptography.
15. Compare Substitution and Transposition techniques.
16. Define Diffusion & confusion.
17. What are the design parameters of Feistel cipher network?
18. Define Product cipher.
19. Explain Avalanche effect.
20. Give the five modes of operation of Block cipher.
21. State advantages of counter mode.
22. Define Multiple Encryption.
23. Specify the design criteria of block cipher.
24. Define Reversible mapping.
25. Specify the basic task for defining a security service.
26. What is the difference between link and end to end encryption?
27. What is traffic Padding? What is its purpose?
28. List the evaluation criteria defined by NIST for AES?
29. What is Triple Encryption? How many keys are used in triple encryption?
PART-B :
1. Explain (a) Playfair cipher (8)
(b) Vernam cipher in detail. (8)
2. Explain simplified DES with example. (16)
3. Write short notes on i) Steganography (16)
4. Explain classical Encryption techniques in detail. (16)
5. Write short notes on
(a) Security services (8)
(b) Feistel cipher structure (8)
6. Explain Data Encryption Standard (DES) in detail. (16)
7. How AES is used for encryption/decryption? Discuss with example. (16)
8. List the evaluation criteria defined by NIST for AES. (16)
UNIT II
PUBLIC KEY CRYPTOGRAPHY :
PART-A : (2 MARKS)
1. Differentiate public key and conventional encryption?
2. What are the principle elements of a public key cryptosystem?
3. What are roles of public and private key?
4. Specify the applications of the public key cryptosystem?
5. What requirements must a public key cryptosystem to fulfill to a secured algorithm?
6. What is a one way function?
7. What is a trapdoor one way function?
8. Define Euler’s theorem and it’s application?
9. Define Euler’s totient function or phi function and their applications?
10. Describe in general terms an efficient procedure for picking a prime number?
11. Define Fermat Theorem?
12. List four general characteristics of schema for the distribution of the public key?
13. What are essential ingredient of the public key directory?
14. Find gcd (1970, 1066) using Euclid’s algorithm?
15. What is the primitive root of a number?
16. Determine the gcd (24140,16762) using Euclid’s algorithm.
17. Perform encryption and decryption using RSA Alg. for the following. P=7; q=11; e=17; M=8.
18. What is an elliptic curve?
PART-B :
1. State and explain the principles of public key cryptography. (16)
2. Explain Diffie Hellman key Exchange in detail with an example (16)
3. Explain the key management of public key encryption in detail (16)
4. Explain RSA algorithm in detail with an example (16)
5. Briefly explain the idea behind Elliptic Curve Cryptosystem. (16)
UNIT III
AUTHENTICATION AND HASH FUNCTION :
PART-A : (2 MARKS)
1. What is message authentication?
2. Define the classes of message authentication function.
3.What are the requirements for message authentication?
4. What you meant by hash function?
5. Differentiate MAC and Hash function?
6. Any three hash algorithm.
7. What are the requirements of the hash function?
8. What you meant by MAC?
9. Differentiate internal and external error control.
10. What is the meet in the middle attack?
11. What is the role of compression function in hash function?
12. What is the difference between weak and strong collision resistance?
13. Compare MD5, SHA1 and RIPEMD-160 algorithm.
14. Distinguish between direct and arbitrated digital signature?
15. What are the properties a digital signature should have?
16. What requirements should a digital signature scheme should satisfy?
PART-B :
1. Explain the classification of authentication function in detail. (16)
2. Describe MD5 algorithm in detail. Compare its performance with SHA-1. (16)
3. Describe SHA-1 algorithm in detail. Compare its performance with MD5 and RIPEMD-160 and discuss its advantages. (16)
4. Describe RIPEMD-160 algorithm in detail. Compare its performance with MD5 and SHA-1.
5. Describe HMAC algorithm in detail. (16)
6. Write and explain the Digital Signature Algorithm. (16)
7. Assume a client C wants to communicate with a server S using kerberos protocol. How cans it be achieved? (16)