Question: Alice is using the public-key authentication protocol of Fig. 8-43 to authenticate communication with Bob. However, when sending message 7, Alice forgot to encrypt R

Alice is using the public-key authentication protocol of Fig. 8-43 to authenticate communication with Bob. However, when sending message 7, Alice forgot to encrypt R_B. Trudy now knows the value of R_B. Do Alice and Bob need to repeat the authentication procedure with new parameters in order to ensure secure communication? Explain your answer.

Figure 8-43

4. Give me EA 1. Give me EB 2. Here is ER Directory 5. Here is EA (, RA) 6 Ea (R, R, Ks) Ks (RB) Alice Bob

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