CS6701 Cryptography and network security, Final year, Department of Computer Science Engineering and Information Technology, First and second Units Questions

CS6701 Cryptography and network security, Final year, Department of Computer Science Engineering and Information Technology, First and second Units Questions

Answer All Questions

            Part A (10*2=20)

1.What is Security mechanism?

2.What is Enchiperment?

3.What is Passive Attack?

4.Define an Attack?

5.What are the ingeridents of a symmetric cipher?

6.DefineMonoalphabetic cipher?

7.What is DES?

8.Define Steganography?

9.What are the DES Weak keys?

       10.Define Finite Field?

Part B (5*16=80)

11(a) i) Explain Security Services?                                                (8)

     ii) Explain Secrity mechanism?.                              (8)

                                    (OR)

 (b) Explain Symmetric Cipher model?                                                (16)

      12. (a)Explain Substitution Techniques.Write any four techniques            (16)

                                                (OR)

            (b) Explain Steganography(16)

13.(a)Explain Number Theory.                                                                  (16)

                                          (OR)

      (b)i)Explain Groups?.                                                                          (8)

           ii) Explain Rings.                                                                                        (8)

14. (a)Explain Euclid’s Algorithm                                                             (16)

                                          (OR)

      (b)Explain Fermat’s and Eulers Theorem                                             (16)

 15.(a)Explain  Data Encryption Standard.                                                 (16)

                                          (OR)

      (b)Explain Block Cipher Modes of Operation                                     (16)