Efficient File-Share Reconstruction Scheme for Device Addition/Removal in Personal Area Network

In this paper, we propose a combinatorial-based file sharing scheme for secure and efficient file management in personal area networks (PAN) on wearable devices. Existing schemes do not account for efficiency problems owing to the addition and removal of devices; specifically, when devices are added or removed, the distributively stored file shares should be newly generated. Thus, we propose a file share reconstruction scheme to reduce energy consumption when devices join and leave a PAN. In this scheme, the file shares stored in the devices of the PAN are reformed with minimum operation costs.