What are the essentials ingredients of a symmetric cipher

 Network Security

 What are the essentials ingredients of a symmetric cipher

Answer the following question.
Q1. List and briefly define categories of security services. (10 marks)
Q2. List and briefly define categories of security mechanisms (10 marks)
Q3. What are the essentials ingredients of a symmetric cipher? (10 marks)
Q4. How many keys are required for two people to communicate via a symmetric cipher? (10 marks)
Q5. What is triple encryption? (10 marks)
Q6. What is a message authentication code? (10 marks)
Q7. List and briefly define three classes of intruders. (10 marks)
Q8. What is the difference between rule-based anomaly detection and rule-based penetration identification? (10 marks)

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