Assignment 9, due Apr 27
Part of
the homework for 22C:169, Spring 2006
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Always, on every assignment, please write your name legibly as it appears on your University ID and on the class list! All assignments will be due at the start of class on the day indicated, and unless there is what insurance companies call "an act of God" - something outside your control; the only exceptions to this rule will be by advance arrangement.
a) Since it's a web server, the output is HTML. Explain several ways in which data can be steganographically encoded in an HTML document (note that HTML and XML are very similar, so tricks that work in one usually work in the other).
b) Suggest a way that an election administration could convince outside observers that the steganographic channel discussed in part a was blocked, and discuss how outside observers can verify that this is the case.
a) With reference to the core concepts of protection domains, gate crossing and the access matrix, what problems does it solve.
b) Give examples of problems it does not solve.