A Behavior Authentication Method Using Wi-Fi BSSIDs around Smartphone Carried by a User

In recent years, numerous people have purchased smartphones and have become accustomed to carrying the devices with them at all times. Most advanced smartphones are now equipped with a variety of sensors that constantly measure and catch information such as geographical location, temperature, humidity, and Wi-Fi data. Among other things, such Wi-Fi data includes service set identifiers (SSID) and basic service set identifiers (BSSID), which are device information used by wireless local area network (LAN) access points. Thus, under normal circumstances, when a user's smartphone is within range of an access point, the device and the access point exchange information. The kinds of data exchanged relate to the user's geographical location histories, and can possibly be used to characterize the user's behavior. Accordingly, in this paper, we propose a personal authentication technique that uses such Wi-Fi information characteristics.