1 What is the OSI security architecture?
2 What is the difference between passive and active security threats?
3 List and briefly define categories of passive and active security attacks.
4 List and briefly define categories of security services.
5 List and briefly define categories of security mechanisms.
1 What are the essential ingredients of a symmetric cipher?
2 What are the two basic functions used in encryption algorithms?
3 How many keys are required for two people to communicate via a cipher?
4 What is the difference between a block cipher and a stream cipher?
5 What are the two general approaches to attacking a cipher?
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