***NEED TO ANSWER The Below Questions (Minimum 100 Words Per Each Answer)

***NEED TO ANSWER The Below Questions (Minimum 100 Words Per Each Answer).

** Need it by 11/07/2019 6 PM EST****

SUBJECT: Network Security

APA Format NEEDED

NO PLAGIARISM

***NEED TO ANSWER the below questions (minimum 100 words per each answer):

List three approaches to message authentication.
What is a message authentication code?
What properties must a hash function have to be useful for message authentication?
In the context of a hash function, what is a compression function?
What are the principal ingredients of a public-key cryptosystem?
List and briefly define three uses of a public-key cryptosystem.
What is the difference between a private key and a secret key?
What is a digital signature?

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