期刊名称：Journal of Wireless Mobile Networks, Ubiquitous Computing, and Dependable Applications
印刷版ISSN：2093-5374
电子版ISSN：2093-5382
出版年度：2013
卷号：4
期号：2
页码：39-62
出版社：Innovative Information Science & Technology Research Group
摘要：Confidentiality and privacy of outsourced data has become one of the pressing challenges in Cloud computing. Outsourced data often includes sensitive personally identifiable information. When data is outsourced, sensitive information will not be under the control of its owners, but under the control of an external service provider. In this paper, we define an approach allowing the protection of confi- dentiality of sensitive information in outsourced multi-relational databases by improving an existing approach based on a combination of fragmentation and encryption. Then we define a secure and effective technique for querying data hosted on several service providers. Finally, we improve the security of the querying technique in order to protect data confidentiality under a collaborative Cloud storage service providers model
关键词：Data confidentiality; Privacy-preserving; Data fragmentation; Data outsourcing
