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Communications of the ACM

Research Archive


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The Research archive provides access to all Research articles published in past issues of Communications of the ACM.

February 2020


From Communications of the ACM

Automating Visual Privacy Protection Using a Smart LED

Automating Visual Privacy Protection Using a Smart LED

We introduce LiShield, which automatically protects a physical scene against photographing, by illuminating it with smart LEDs flickering in specialized waveforms.


From Communications of the ACM

Technical Perspective: Lighting the Way to Visual Privacy

"Automating Visual Privacy Protection Using a Smart LED," presents a new technique to address the issue of cameras capturing proprietary or private information—it stops most digital cameras from recording a useful image while…