MID_NS_VII - Q.1 Explain the DES algorithm with the help of...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Birla Institute of Technology & Science, Pilani Distance Learning Programmes Division Second Semester 2006-2007 Mid-Semester Test (EC-1 Regular) Course No. : SS ZG513 Course Title : NETWORK SECURITY Nature of Exam : Closed Book Weightage : 40% Duration : 2 Hours Date of Exam : 03/02/2007 (FN) Note: 1. Please follow all the Instructions to Candidates given on the cover page of the answer book. 2. All parts of a question should be answered consecutively. Each answer should start from a fresh page. 3. Mobile phones and computers of any kind should not be brought inside the examination hall. 4. Use of any unfair means will result in severe disciplinary action.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Q.1. Explain the DES algorithm with the help of suitable diagram(s). [13] Q.2. Explain clearly the working of the RSA algorithm. Compare briefly the speeds of RSA and DES. State how security is achieved in RSA. [10 + 2 + 1 = 13] Q.3 (a) Discuss briefly an efficient algorithm to compute a x mod n. Show how the algorithm works when a = 51, x = 16, n = 7. [4 + 2 = 6] Q.3 (b) Consider the equation ax ≡ 1 mod n given a and n (n > 1). State the condition for the equation to have a unique solution modulo n. Solve the equation when a = 55, n = 97. [2 + 6 = 8] ******** No. of Pages = 1 No. of Questions = 3...
View Full Document

  • Spring '11
  • raj
  • Birla Institute of Technology & Science, Pilani Distance Learning, Course Title Nature, Exam Weightage Duration

{[ snackBarMessage ]}

Ask a homework question - tutors are online