Multi-Platform Application Interaction Extraction for IoT Devices

IoT devices used in smart home have become a fundamental part of modern society. Such devices enable our living space to be more convenient. This enables human interaction with physical environment, also happens between two applications or others third-party rules in addition, and causes some unexpected automation, even causes safety concerns. What's worse is that attackers can leverage stealthy physical interactions to launch attacks against IoT systems or steal user privacy. In this paper, we propose a tool called IoTIE that discovers any possible physical interactions and extract all potential interactions across applications and rules in the IoT environment. And we present a comprehensive system evaluation on the Samsung SmartThings and IFTTT platform. We study 187 official SmartThings applications and 98 IFTTT rules, and find they can form 231 hidden inter-app interactions through physical environments. In particular, our experiment reveals that 74 interactions are highly risky and could be potentially exploited to impact the security and safety of the IoT environment.