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\documentclass{article}
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\usepackage{charter}
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\usepackage{hyperref}
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\begin{document}
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\section*{Homework 3}
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\begin{enumerate}
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\item What does the principle of least privilege say?
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\item In which of the following situations can the access control mechanism of Unix
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file permissions be used?
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\begin{itemize}
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\item[(a)] Alice wants to have her files readable, except for her office mates.
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\item[(b)] Bob and Sam want to share some secret files.
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\item[(c)] Root wants some of her files to be public.
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\end{itemize}
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\item What should the architecture of a network application under Unix
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be that processes potentially hostile data?
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\item How can you exploit the fact that every night root has a cron
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job that deletes the files in \texttt{/tmp}?
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\item What does it mean that the program \texttt{passwd} has the \texttt{setuid}
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bit set? Why is this necessary?
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\item What does the Bell --- La Padula model ensure? Similarly, what does the Biba model ensure?
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\end{enumerate}
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\end{document}
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%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: t
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%%% End:
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