BLE Sniffing for Crowd Sensing and Directionality Scanning of Mobile Devices Inside Tunnels

With the predominance of individual Bluetooth gadgets, smartphone user's security and privacy have been an expanding concern. Until now, Bluetooth traffic sniffing has been regarded as a complex errand because of Bluetooth's indiscoverable mode and adaptive hopping behavior. This paper presents a novel BLE Scanning system for motorway tunnels which its goal is to use Bluetooth Sniffing, guide and show the emergency exit receiving the RSSI values from users' smartphones and thus, find the directionality of the users in real time, in case of an emergency in a tunnel. In addition, the authors proposed BLE Scanning system and presented the preliminary results that have been carried out in a tunnel in the largest motorway in Greece, named EGNATIA ODOS.