What is security? Explain different type of passive attack with example. [1+4]
What is confusion and diffusion? Decrypt the cipher text CDFNFTDTSBEQ with the key FOHSS using Playfair cipher. [2+3]
What is Group? Find the GCD (72345, 43215) using Euclidean algorithm [1+4]
Explain Key Schedule of AES algorithm. [5]
What is token based authentication? Explain core component of trust framework. [1+4]
What is digital signature? List and explain the phase of computer virus? [2+3]
What is audit trail? Why is it important in security auditing? [2+3]
Attempt any TWO questions
[2x10=20]What do you mean by "Feistel Structure for Block Ciphers"? Explain with block diagram. How can a number can be tested for primality testing using Miller-Rabin algorithm? Explain with suitable example. [5+5]
Explain the properties of hash functions. Discuss how hash value is generated using SHA-1 algorithm with neat diagram. [3+7]
What is Pretty Good Privacy (PGP)? Explain any five services provided by PGP for email security. [2+8]