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A comment on Listen to Your Key: Towards Acoustics-based Physical Key Inference. Parent comment

Re:Listen to Your Key: Towards Acoustics-based Physical Key ... by Polylactic_acid on Tuesday August 18, 2020 @10:07PM (#24206473)
And sitting next to the doorknob holding your microphone while someone walks in is totally legit. You aren't going to get a clean recording while hiding behind the fence.
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Re:Listen to Your Key: Towards Acoustics-based Physical Key ... by craftinator on Tuesday August 18, 2020 @10:16PM (#24206515)
I have an esp32 board with a MEMS microphone embedded in it that's about the size of a quarter, and can be powered for hours with a watch battery. So yeah, I can get a clean recording while hiding behind a fence... I just won't be holding the microphone.
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