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Erschienen in:
2007 | OriginalPaper | Buchkapitel
Automata-Based Confidentiality Monitoring
verfasst von : Gurvan Le Guernic, Anindya Banerjee, Thomas Jensen, David A. Schmidt
Erschienen in: Advances in Computer Science - ASIAN 2006. Secure Software and Related Issues
Verlag: Springer Berlin Heidelberg
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Non-interference is typically used as a baseline security policy to formalize confidentiality of secret information manipulated by a program. In contrast to static checking of non-interference, this paper considers dynamic, automaton-based, monitoring of information flow for a single execution of a sequential program. The monitoring mechanism is based on a combination of dynamic and static analyses. During program execution, abstractions of program events are sent to the automaton, which uses the abstractions to track information flows and to control the execution by forbidding or editing dangerous actions. The mechanism proposed is proved to be sound, to preserve executions of well-typed programs (in the security type system of Volpano, Smith and Irvine), and to preserve some
safe
executions of ill-typed programs.