KERALA UNIVERSITY Class 7 cryptography Question Paper 2008

Practice authentic previous year questions for better exam preparation.

Sample Questions

What are the various stages performed in a single round of AES algorithm except the first and last round?
Define P, NP, NP Complete class of problems. Answer any two questions from each module. Each question carries 10 marks.
Define ring and field. Prove that the set $Z_{9}=\{0,1, \ldots, 8\}$ under addition modulo 9 and multiplication modulo 9 is a ring but not field.
State Fermat's little theorem and Euler's theorem. Find $5^{103} \bmod 103$ and $5^{102} \bmod 103$. Also find $\phi(35)$ and $\phi(37)$.
Discuss the principle behind secret key cryptography and public key cryptography.