TAILIEUCHUNG - Lecture Network security: Chapter 22 - Dr. Munam Ali Shah

In this chapter you would be able to present an understanding of the confidentiality and message authentication mechanism, you would be able demonstrate knowledge about different functions and protocols used for message authentication. | Network Security Lecture 22 Presented by: Dr. Munam Ali Shah Part – 2 (e): Incorporating security in other parts of the network Summary of the Previous Lecture In previous lecture we continued our discussion on Confidentiality using symmetric encryption We talked about Master Key/Session Key We also talked about Key storage, key hierarchy, key renewal and lifetime of a session key We also explored the issues with centralized and decentralized key distribution. Summary of the previous lecture A key distribution scenario Outlines of today’s lecture Some discussion on Decentralized Key Control Message Authentication Mechanism Message encryption MAC Hash Objectives You would be able to present an understanding of the confidentiality and message authentication mechanism. You would be able demonstrate knowledge about different functions and protocols used for message authentication Decentralized Key Control 7 Decentralized Key Control For n end system, [n(n-1)]/2 master keys are required. .

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