The document is an exam paper for an Information Security course. It contains two parts - Part A with short answer questions covering topics like security attacks, ciphers, digital signatures and Part B with longer answer questions about algorithms, protocols and security models that students can choose to answer.
The document is an exam paper for an Information Security course. It contains two parts - Part A with short answer questions covering topics like security attacks, ciphers, digital signatures and Part B with longer answer questions about algorithms, protocols and security models that students can choose to answer.
The document is an exam paper for an Information Security course. It contains two parts - Part A with short answer questions covering topics like security attacks, ciphers, digital signatures and Part B with longer answer questions about algorithms, protocols and security models that students can choose to answer.
The document is an exam paper for an Information Security course. It contains two parts - Part A with short answer questions covering topics like security attacks, ciphers, digital signatures and Part B with longer answer questions about algorithms, protocols and security models that students can choose to answer.
R13 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B. Tech III Year II Semester Examinations, May - 2016 INFORMATION SECURITY (Computer Science and Engineering) Time: 3hours Max.Marks:75
Note: This question paper contains two parts A and B.
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART- A (25 Marks)
1.a) What are the types of security attacks? [2]
b) Compare substitution ciphers with transposition ciphers. [3] c) Compare block ciphers with stream ciphers. [2] d) Write about strength of DES algorithm. [3] e) What is a digital signature? [2] f) What properties must a hash function have to be useful for message authentication?[3] g) What are the various PGP services? [2] h) What parameters identify an SA and what parameters characterize the nature of a particular SA? [3] i) What is cross site scripting vulnerability? [2] j) What are the limitations of firewalls? [3]
PART-B (50 Marks)
2.a) Consider the following:
Plaintext: “PROTOCOL” Secret key: “NETWORK” What is the corresponding cipher text using play fair cipher method? b) What is the need for security? [5+5] OR 3.a) Explain the model of network security. b) Write about steganography. [5+5]
4. Explain the AES algorithm. [10]
OR 5. Consider a Diffie-Hellman scheme with a common prime q=11, and a primitive root α=2. a) If user „A‟ has public key YA=9, what is A‟s private key XA. b) If user „B‟ has public key YB=3, what is shared secret key K. [5+5]
6. Explain HMAC algorithm. [10]
OR 7.a) Explain the DSA algorithm. www.ManaResults.co.in b) What is bio-metric authentication? [5+5] 8.a) Explain PGP trust model. b) What are the key components of internet mail architecture? [5+5] OR 9.a) Explain MIME context types. b) What are the five principal services provided by PGP? [5+5]
10. Explain secure electronic transaction. [10]
OR 11.a) Explain password management. b) What are the types of firewalls? [5+5]
