Authorized Wireless Charging System based on Double-Frequency-Hopping for Mobile Devices

Abstract

As the number of mobile devices used in everyday life increases, interest in wireless charging technology
for continuous use anytime and anywhere is increasing. The existing wireless charging
method transmits power to all mobile devices within the transmission distance, which causes unauthorized
users to gain access to the service, thus causing security problems. Therefore, a technology
for verifying the usage right to filter unauthorized users is emerging as a main technology of wireless
charging technology. In this paper, we propose the security requirements for verifying the authority
of the wireless charging users based on the requirements for providing the resources to the authorized
users and the technical research for transmitting the power to the existing wireless communication
method. Considering the moving target defense technology, we designed and implemented a doublefrequency-
hopping based wireless charging system for COTS mobile devices, based on the security
requirements.