(1) Consider a financial report publishing system used to produce reports for various Organizations.

a. Give an example of a type of publication in which confidentiality of the stored data is the most important requirement.

b. Give an example of a type of publication in which data integrity is the most important requirement.

c. Give an example in which system availability is the most important requirement.

(2) Using the keyword "business" construct a Playfair matrix and encrypt the below text.

Plain text : scienceisanintegralpartofourcivilization

(3) What is the purpose of the S-boxes and P-boxes in DES?

(4) Create a table for Arithmetic Modulo 9 (Addition Modulo 9, Multiplication Modulo 9)