论文标题
气压计可以听到并感知手指的水龙头
Barometers Can Hear, and Sense Finger Taps
论文作者
论文摘要
大多数现代智能手机都配备了晴雨表来采样气压。访问这些样品是无害的，因此不需要任何许可。但是，在这项工作中，我们表明这些样品可以在具有入学保护的智能手机中揭示敏感信息。首次表明，即使以25 Hz的速度低率，晴雨表样品也会泄漏有关智能手机扬声器活动的信息。具体来说，我们使用这些样品以高精度检测（> = 95％）是智能手机的扬声器是否保持沉默或播放诸如铃声之类的声音。此外，我们使用样品来检测外部扬声器的活性。最后，我们表明，低速率晴雨表样品可用于1）检测100％精度的触摸屏手指水龙头，以及2）获得有关手指水龙头位置的信息。
Most modern smartphones are equipped with a barometer to sample air pressure. Accessing these samples is deemed harmless, hence does not require any permission. In this work, we show, however, that these samples can reveal sensitive information in smartphones with ingress protection. For the first time, it is shown that barometer samples, even at a low rate of 25 Hz, can leak information about the smartphone's speaker activity. Specifically, we use these samples to detect with high accuracy (>= 95%) whether the smartphone's speaker is silent or playing a sound such as a ringtone. In addition, we use the samples to detect the activity of an external speaker. Finally, we show that low-rate barometer samples can be used to 1) detect touchscreen finger taps with 100% accuracy, and 2) gain information about the positions of finger taps.
