Alice works for a, financial company. She regularly works from home and transfers files of private/sensitive financial data between her home computer and the company’s file server, Bob, which is connected to the Internet through the company’s network. The files transferred often contain large amounts of data.
Identify two security requirements for the protection of communications between Alice and Bob, and explain why these two requirements are essential.
Design a secure communication protocol that allows:
Alice to request a private file from Bob
Bob to respond by sending the requested file to Alice, where both symmetric and asymmetric (or public-key) cryptosystems including secure hash functions are available for the protocol design.
Explain how the designed protocol operates.
Justify how the protocol produced in B (2) satisfies each of the two security requirements identified in B (1).
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