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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