Question: 23. Consider an authenticated online file storage system that allows users to upload files and ensure their integrity when they download them. Suppose that Alice

23. Consider an authenticated online file storage system that allows users to upload files and ensure their integrity when they download them. Suppose that Alice uploads really large file, and wants to be able to verify later that the file she downloads is the same as the one she uploads. What is a possible solution for Alice to perform the above activities? What do we call it? (4 points)

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