With the increase of mobile IoT devices, there must be means for devices which have no previous established communication to securely communicate. This disclosure provides a method for determining proximity between a single-antenna device and a transmitting device, a method for determining whether a radio signal originated from a target or adversarial transmitting device, and a method for secure short-range information exchange between a single-antenna device and a transmitting device. Thus, this invention describes methods to establish trust between two devices, one of which is a single-antenna device, in close proximity without a prior established connection.
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Timothy J. Pierson, Ronald Peterson, and David F. Kotz, “System and Method for Proximity Detection with Single-Antenna Device,” January 9, 2024, accessed January 14, 2025, https://patents.google.com/patent/US11871233B2/en.
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