More Enforceable Security Policies
by Lujo Bauer, Jarred Ligatti and David Walker - Department of Computer Science - Princeton University
We analyze the space of security policies that can be enforced by monitoring programs at runtime. Our program monitors are automata that

examine the sequence of program actions and transform the sequence

when it deviates from the specified policy. The simplest such automaton

truncates the action sequence by terminating a program. Such automata

are commonly known as security automata, and they enforce Schneider's

EM class of security policies. We define automata with more powerful

transformational abilities, including the ability to insert a sequence of actions into the event stream and to suppress actions in the event stream

without terminating the program. We give a set-theoretic characterization

of the policies these new automata are able to enforce and show that

they are a superset of the EM policies.

Download the paper in PDF format here.

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