BibTeX for papers by David Kotz; for complete/updated list see https://www.cs.dartmouth.edu/~kotz/research/papers.html @InProceedings{pierson:snap-poster, author = {Timothy J. Pierson and Travis Peters and Ronald Peterson and David Kotz}, title = {{Poster: Proximity Detection with Single-Antenna IoT Devices}}, booktitle = {{Proceedings of the ACM International Conference on Mobile Computing and Networking (MobiCom)}}, year = 2018, month = {October}, pages = {663--665}, publisher = {ACM}, copyright = {ACM}, DOI = {10.1145/3241539.3267751}, URL = {https://www.cs.dartmouth.edu/~kotz/research/pierson-snap-poster/index.html}, abstract = {Close physical proximity among wireless devices that have never shared a secret key is sometimes used as a basis of trust. In these cases, devices in close proximity are deemed trustworthy while more distant devices are viewed as potential adversaries. Because radio waves are invisible, however, a user may believe a wireless device is communicating with a nearby device when in fact the user's device is communicating with a distant adversary. Researchers have previously proposed methods for multi-antenna devices to ascertain physical proximity with other devices, but devices with a single antenna, such as those commonly used in the Internet of Things, cannot take advantage of these techniques. We investigate a method for a single-antenna Wi-Fi device to quickly determine proximity with another Wi-Fi device. Our approach leverages the repeating nature Wi-Fi's preamble and the characteristics of a transmitting antenna's near field to detect proximity with high probability. Our method never falsely declares proximity at ranges longer than 14 cm.}, }