Abstract
Combining different independent cloud services must coordinate their access control policies. Otherwise unauthorized access to composite cloud service can occur when there’s a conflict among different cloud service providers’ access control policies, and then it will bring serious data security and privacy issues. In this paper, we propose Packet, a novel access control policy composition method that can detect and resolve policy conflicts in cloud service composition, including those conflicts related to privacyaware purposes and conditions. The Packet method is divided into four steps. First, employing a unified description, heterogeneous policies are transformed into a unified attributebased format. Second, to improve the conflict detection efficiency, policy conflicts on the same resource can be eliminated by adopting cosine similarity-based algorithm. Third, exploiting a hierarchical structure approach, policy conflicts related to different resources or privacy-aware purposes and conditions can be detected. Fourth, different conflict resolution techniques are presented based on the corresponding conflict types. We have successfully implemented the Packet method in Openstack platform. Comprehensive experiments have been conducted, which demonstrate the effectiveness of the proposed method by the comparison with the existing XACML-based system at conflict detection and resolution performance.
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Li Lin is a lecturer and master tutor at College of Computer Science, Beijing University of Technology, China. She received her PhD degree in computer science from Beihang University, China in 2009 and her master degree in basic mathematics from Guangxi Normal University, China in 2004. Her current research interests include cloud computing and information security.
Jian Hu is currently pursuing the master degree in computer science from Beijing University of Technology, China. He received his bachelor degree in computer science from the South-Central University for Nationalities, China in 2013. His current research interests include access control middleware development in cloud computing platforms, access control policy composition for cloud service composition.
Jianbiao Zhang received the BS, MS, and PhD degrees from the Northwestern Polytechnic University, China in 1992, 1995, and 1999 respectively. From 1999 to 2001, he was a postdoctoral fellow in Beihang University, China. Now he is a professor and PhD supervisor in College of Computer Science, Beijing University of Technology, China. His research interests include network and information security, trusted computing.
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Lin, L., Hu, J. & Zhang, J. Packet: a privacy-aware access control policy composition method for services composition in cloud environments. Front. Comput. Sci. 10, 1142–1157 (2016). https://doi.org/10.1007/s11704-016-5503-9
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DOI: https://doi.org/10.1007/s11704-016-5503-9