KERALA UNIVERSITY Class 8 crytography and networks security Question Paper 2008

Practice authentic previous year questions for better exam preparation.

Sample Questions

What is the difference between a block cipher and a stream cipher? Give one example of each.
Encrypt the sentence cryptographic techniques' using Vignere cipher with key a 'cryptanalysis'.
What parameters determine the actual algorithm of a Feistel cipher?
What is Euler's totient function $(\varphi(n))$ ? Write all numbers which are relatively prime to 15.
What is a message authentication code?