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Mobile Information Systems
Volume 2017 (2017), Article ID 2925465, 5 pages
https://doi.org/10.1155/2017/2925465
Research Article

Certificateless Public Auditing with Privacy Preserving for Cloud-Assisted Wireless Body Area Networks

School of Computer Science and Software, Tianjin Polytechnic University, Tianjin 300387, China

Correspondence should be addressed to Baoyuan Kang; moc.nuyila@gnaknauyoab

Received 9 January 2017; Accepted 11 April 2017; Published 6 July 2017

Academic Editor: Stefania Sardellitti

Copyright © 2017 Baoyuan Kang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

With cloud computing being integrated with wireless body area networks, the digital ecosystem called cloud-assisted WBAN was proposed. In cloud-assisted medical systems, the integrity of the stored data is important. Recently, based on certificateless public key cryptography, He et al. proposed a certificateless public auditing scheme for cloud-assisted WBANs. But He et al.’s scheme is not a scheme with privacy preserving. After many checks on some of the same data blocks, the auditor can derive these data blocks. In this paper, we propose a certificateless public auditing scheme with privacy preserving for cloud-assisted WBANs. In the proof phase of the proposed scheme, the proof information is protected from being directly exposed to the auditor. So, the curious auditor could not derive the data blocks. We also prove that the proposed scheme is secure in the random oracle model under the assumption that the Diffie-Hellman problem is hard, and we give a comparison of the proposed scheme with He et al.’s scheme in terms of security and computation cost.