Tribhuvan University
Bachelor of Information Technology
Semester 5 · TU Board 2079
Course Title: Information Security (BIT303)
Full Marks: 60Pass Marks: 24Time: 3 hours
Candidates are required to give their answers in their own words as far as practicable.
Group A
Attempt any Two questions.(2 × 10 = 20)
- 1.10
What is hash function? Describe how 128-bit of hash value is generated by taking an input message of variable size using MD5 algorithm?
- 2.10
Explain different ethical issues in computing? Explain RSA algorithm with suitable numerical example.
- 3.10
What is symmetric cryptography? Explain round operation of DES algorithm. Describe Sub-Key generation process for DES rounds.
Group B
Attempt any Eight questions(8 × 5 = 40)
- 4.5
Define authentication. How Biometric information can be used for authentication? Explain.
- 5.5
What is access control? Explain attribute based access control with example.
- 6.5
Decrypt the cipher text "CRHG" using the Hill cipher with the key matrix3455
- 7.5
What is security risk assessment? What are different aspects of a successful security risk assessment?
- 8.5
Differentiate between virus, worm and Trojan horse.
- 9.5
What is Security threat and attack? Describe different types of attacks in brief.
- 10.5
Explain Diffie Hellman Key Exchange Protocol with suitable example.
- 11.5
Define Euler Toient function. Determine whether 37 is Composite or not using Miller Rabin Primality testing.
- 12.5
Write Short Notes on: a. Phishing Attack b. Two Factor Authentication
Answer comingAlso asked in 2080
— The End —