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LLSS: Toward System Support for Plugging Privacy Leaks

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

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LLSS: Toward System Support for Plugging Privacy Leaks

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  1. LLSS: Toward System Support for Plugging Privacy Leaks

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

  3. 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”]

  4. 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

  5. Questions?

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