Generate KERALA UNIVERSITY Class 8 crytography and networks security Question Paper

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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?

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