Security services, Computer Network Security

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(a) Mention the five main security services.

(b) What is a passive attack? Give an example of passive attack?

(c) What four types of active attacks and mention their respective attacks to which security services?

(d) Distinguish between authentication and non-repudiation.

(e) Which type of algorithms can be used to provide the following security services:

i. Message integrity

ii. Message integrity and authentication

(f) Describe how public key cryptography can be used to provide message confidentiality when Alice wants to communicate with Bob.


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