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Modern electronic devices have become “smart” as well as omnipresent in our day-to-day lives. From small household devices to large industrial machines, smart devices have become very popular in every possible application domain. Smart devices in our homes, offices, buildings, and cities can connect with other devices as well as with the physical world around them. This increasing popularity has also placed smart devices as the center of attention among attackers. Already, several types of malicious activities exist that attempt to compromise the security and privacy of smart devices. One interesting and noteworthy emerging threat vector is the attacks that abuse the use of sensors on smart devices. Smart devices are vulnerable to sensor-based threats and attacks due to the lack of proper security mechanisms available to control the use of sensors by installed apps. By exploiting the sensors (e.g …