Automated key distribution approach

1. Consider a Diffie-Hellman scheme with a common prime q = 11 and a primitive root a = 2.

a. If user A has public key YA = 9, what is A’s private key XA?

b. If user B has public key YB = 3, what is the shared secret key K?

2. What is a key distribution center?

3. What are the advantages of the automated key distribution approach?

4. What is Kerberos?

5. Identify the security threats that exist in an open distributed network.

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