Question 1
(a)
List and define any three security services.
3 Marks
(b)
Define Cryptography and Steganography. Which technique (Cryptography or Steganography) is used in each of the following cases for confidentiality?
1)A student writes the answer to a test on a small piece of paper, rolls
up the paper and inserts it in a ball-point pen, and passes the pen to
another student.
2)To send a message, a spy replaces each character in the message
with a symbol that was agreed upon in advance as the character's
replacements.
4 Marks
(c)
Discuss following attacks.
1)Brute force attack
2)Frequency analysis attack
3)Man in the middle attack
4)Active attack
5)Passive attack
6)Meet in the middle attack
7)Known plaintext attack
7 Marks