Question: 1. (10 points) The expanded Needham-Schroeder Protocol can be shortened to a 6-message protocol without loss of security by merely removing the 7h message. Why

1. (10 points) The expanded Needham-Schroeder Protocol can be shortened to

1. (10 points) The expanded Needham-Schroeder Protocol can be shortened to a 6-message protocol without loss of security by merely removing the 7h message. Why is this true? (Hint: the purpose of the 7h message is to prove to Bob that he is talking to Alice, but he already knows that. Why?) 1. (10 points) The expanded Needham-Schroeder Protocol can be shortened to a 6-message protocol without loss of security by merely removing the 7h message. Why is this true? (Hint: the purpose of the 7h message is to prove to Bob that he is talking to Alice, but he already knows that. Why?)

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