Question 14: Show that the Diffie-Helman key agreement is not secure against active adversaries. How can you fix it? Present at least two different modifications to the Diffie Helman key exchange to make it secure against active attacks (one based on symmetric cryptography and another one based on assymetric cryptography).

Question 15: Describe the messages exchanges in the Handshake phase of the TLS/SSL protocol.

Question 16: Explain the BEAST attack agains the TLS/SSL protocol.