Unit No. 2
Important Questions
Q 1. Explain the applications and requirements of public key cryptography?
Q. 2 Explain the RSA algorithm with an example?
Q. 3 Write and explain the Diffie-Helman Key exchange algorithm?
Q. 4 Explain the distribution of public keys using public-key certificates?
Q. 5 What is a message authentication code? What are the basics of MAC?
Q. 6 How is message authentication achieved using Hash functions?
Q. 7 Explain the Man-in-the-Middle attack?
Q. 8 Consider the Diffie-Hellman Scheme with common prime q=11 and primitive root alpha =2
A. Show that 2 is the primitive root of 11.
B. If
user A has a public key YA=9, what is A’s private key XA?
C. If user B has a public key YB=3, what is a shared secret key?
Q. 9 Explain the principles of public key cryptosystems?
Q. 10 How can encryption be used for message authentication?
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