A lightweight key distribution scheme for secure D2D communication

Key distribution plays a crucial role in secure device-to-device (D2D) communication. However, due to the lack of infrastructure of D2D communication and the limited storage and computing capability of wireless devices, many key distribution methods based traditional cryptography cannot be directly applied to D2D communication scenarios. In this paper, a lightweight key distribution scheme is proposed by using acceleration sensors. Specifically, a lightweight extreme points extraction and filtering algorithm is presented in the proposed scheme to extract extreme points for key generation. Moreover, a lightweight index matching algorithm is designed in the proposed scheme to further improve the bit match rate. Furthermore, an application of the proposed scheme is developed on android system and developed by JAVA. Through extensive experiments, it is demonstrated that the proposed scheme can distribute a secure key with high entropy and low computing resources and energy consumption.