LLSS: Toward System Support for Plugging Privacy Leaks

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Presentation transcript:

LLSS: Toward System Support for Plugging Privacy Leaks

Privacy leak scenario Alice Bob Despite Alice’s best efforts, Bob’s best intentions, and no system compromises ...

Frighteningly plausible “Usability and privacy: a study of Kazaa…” Good and Krekelberg, SigCHI 2003 In 12 hours, found 150 inboxes on Kazaa Observed people downloading them Problem People don’t understand software interactions LLSS [“Loose Lips Sink Ships”]

LLSS approach Ask users What and Who, not How Help users define system meta-data Find sensitive files (email, ssn, cc numbers) Infer other trusted hosts Use meta-data to identify potential leaks Interpose on file system and socket syscalls Use speculative execution to detect leaks

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