Abstract
Device-to-device (D2D) network utilizes various communication methods and regional resource sharing mechanisms, which, despite the efficient and effective communications, may lead to a variety of security threats. Therefore, without the assistance from the base station, effective managing regional resources and protecting private data on mobile devices have become a major challenge in D2D networks. In this paper, we propose a reliability-based central node election mechanism in a D2D network, where the attribute information is collected, normalized, and weight-summed to acquire the reliability of each mobile device. The central node can therefore be elected by sorting the reliability of all mobile devices. Furthermore, we propose a security protection mechanism of private data based on homomorphic encryption in a D2D network, where homomorphic encryption is employed to implement secure data aggregate of ciphertext in the elected central node. Finally, theoretical analyses and simulation experiment verify the superior effectiveness and efficiency of the proposed schemes.
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