Proposal and Evaluation of Secure Device Pairing Method with Camera and Accelerometer

With the advancement of wireless short-range technology, the number of mobile devices is also increasing. Consequently, devices often exchange information using wireless communications, but this communication has vulnerabilities, such as eavesdropping and man-in-the-middle attack. Therefore, it is necessary to perform secure pairing between devices before wireless communication begin. In this paper, we assume that devices are securely paired in limited space, such as a room using wireless communication. The method for secure pairing using Received signal strength (RSS) is simple, but RSS is easy to change due to environmental factors. Recently, pairing methods using camera and accelerometer are studied. However, these methods do not directly detect inclination of the device. We propose the one of secure device pairing method using camera and accelerometer. Our proposed method make the camera read a marker on the display of the device. The marker's inclination corresponds to the device's inclination, hence, we assume that the accuracy is higher than that of existing methods.