problem 1: Give the overall structure of the simplified DES scheme and describe its functions.

problem 2: Describe in detail regarding the design principles of International Data Encryption Algorithm.

problem 3: Describe about key distribution method and describe the manners in which it can be accomplished.

problem 4: describe the RSA algorithm of public-key crypto system.

problem 5: Give a summary of the design principles of firewall.

problem 6: Describe different kinds of attacks on the security of a computer system.

problem 7: Describe the characteristics of the Blowfish Cipher.

problem 8: What are the major operations of the CAST-128 encryption?

problem 9: Describe the characteristics of link and end-to-end encryption approaches.

problem 10: What do you mean by modular arithmetic? Describe its properties.

problem 11: State and prove the Fermat’s theorem of public-key cryptography.

problem 12: Describe different approaches of detecting the intruders.