This question comes book Elementary Information Security, second edition; by Richard E. Smith; ISBN 978-1-2840559-3-1

Chapter 8, Exercise 6

Bob plans to use Diffie-Hellman to construct a shared secret to encrypt a file shared with Alice. Eve wants to perform a bucket brigade attack and read the shared file.

a. Draw a diagram similar to figure 8.14 showing how Eve takes part as an invisible participant of the Diffie-Hellman exchange between Bob and Alice.

b. Based on your answer to (a), draw a diagram showing how the contents of Bob's file is shared with Alice.