Authorized Private Keyword Search over Encrypted Data in Cloud Computing

—In cloud computing, clients usually outsource their data to the cloud storage servers to reduce the management costs. While those data may contain sensitive personal information, the cloud servers cannot be fully trusted in protecting them. Encryption is a promising way to protect the confidentiality of the outsourced data, but it also introduces much difficulty to performing effective searches over encrypted information. Most existing works do not support efficient searches with complex query conditions, and care needs to be taken when using them because of the potential privacy leakages about the data owners to the data users or the cloud server. In this paper, using online Personal Health Record (PHR) as a case study, we first show the necessity of search capability authorization that reduces the privacy exposure resulting from the search results, and establish a scalable framework for Authorized Private Keyword Search (APKS) over encrypted cloud data. We then propose two nov...

• Type: Journal
• Year: 2011
• Where: ICDCS
• Authors: Ming Li, Shucheng Yu, Ning Cao, Wenjing Lou
• Keywords: Distributed And Parallel Computing, ICDCS 2011, Personal Health Record, Query Conditions, Storage Servers