Solve the following three problems. 1. Privacy and anonymity A service lets users browse the Internet anonymously through a network of proxy servers. To avoid having their identities compromised, users must install special software that modifies the way their web browsers behave. In the absence of each change or action listed below, describe an attack that would reveal information about the user's identity. Assume that the user regularly visits web sites under adversarial control, but that the adversary is physically separated from the user. Changes that apply while the anonymous browsing service is enabled: (a) Disable the HTTP Referer header (b) Disable Java and Flash (c) Set the HTTP User-Agent header to a generic value (d) Resize browser windows to multiples of 35 pixels Actions that occur each time the user enables or disables the anonymous browsing service: (e) Close all open sites (f) Clear the history list (g) Clear the cookie store (h) Clear the browser cache