Q7. (17 points). Explain how a session key, k, generated by a party, A, can be securely transferred to a party, B, assuming that B has a certificate issued by a certificate authority, CA. Show step-by-step scenario of the parties A and B communication, and explain each step functionality. Q7. (17 points). Explain how a session key, k, generated by a party, A, can be securely transferred to a party, B, assuming that B has a certificate issued by a certificate authority, CA. Show step-by-step scenario of the parties A and B communication, and explain each step functionality