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With the rapid development of the Internet of Things (IoT), there are billions of interacting devices and applications. With so many devices and applications, one of the most critical challenges is how to provide security. Traditional software-based defenses will not be enough to protect the security of IoT because of the attack surfaces derived from the physical environment. For example, an attacker can physically re-point a surveillance camera, can move a smart device to another location, can send a sound signal to influence an accelerometer, can cause wireless jamming, etc. We propose to create "smart buttons," and collections of them called "smart blankets" as hardware/software (HW/SW) security patches rather than software-only patches. These fixes operate similarly to software patches, but because of the hardware added, these new patches can better support against physical world attacks. While this paper primarily presents a vision for HW/SW patches, solutions are implemented and shown for two classes of attacks involving cameras and robots. Open questions are also discussed. |
