WiFiOTP: Pervasive two-factor authentication using Wi-Fi SSID broadcasts

Two-factor authentication can significantly reduce risks of compromised accounts by protecting from weak passwords, online identity theft and other online fraud. This paper presents a new easy solution to implement two-factor authentication without affecting user experience by introducing minimum user interaction based on standard Wi-Fi. It has been validated with different software and hardware implementations in a real life environment to show it can easily be deployed in many cases.