LSKA: Location Similarity Based Key Agreement Scheme for Smartphone Networks

With the recent popularization of smartphones, more attention has been given to design dynamic keys for smartphone communications. In this paper, we particularly work to meet the requirement of encrypted information sharing among closely located smartphones. Considering the fact that GPS locations of smartphones are available, we propose a key agreement scheme, denoted by LSKA, based on the location similarity and the adoption of the fuzzy vault scheme. We implement a LSKA prototype app on Android smartphones. The practicality and the applicability of LSKA have been verified via the experiments under several typical environments.