Data mining has large applications in many real world areas. Classification is one of the frequently needed tasks in data mining frameworks. For the existing studies, due to the rise of different privacy problems, various solutions to the theoretical and practical classification issues have been suggested under different security models. In this paper proposed a protected k-NN classifier over P...

XQuery is a powerful and convenient language that is designed for querying the data in XML documents. In this paper, we address how to optimally query encrypted XML documents using XQuery, with the key point being how to eliminate redundant decryption so as to accelerate the querying. We propose a processing model that can automatically and appropriately translate the XQuery statements for encr...

Enterprise customers of cloud services are wary of outsourcing sensitive user and business data due to inherent security and privacy concerns. In this context, storing and computing directly on encrypted data is an attractive solution, especially against insider attacks. Homomorphic encryption, the keystone enabling technology is unfortunately prohibitively expensive. In this paper, we focus on...

Over the last few years, data storage in cloud based services has been very popular due to easy management and monetary advantages of cloud computing. Recent developments showed that such data could be leaked due to various attacks. To address some of these attacks, encrypting sensitive data before sending to cloud emerged as an important protection mechanism. If the data is encrypted with trad...

Data security is well-recognized a vital issue in an information system that is supported in an outsource environment. However, most of conventional XML encryption proposals treat confidential parts of an XML document as whole blocks of text and apply encryption algorithms directly on them. As a result, queries involving the encrypted part cannot be efficiently processed. In order to address th...

Data have significant economic or social value in many application fields including science, business, governance, etc. This naturally leads to the emergence of data markets such as GBDEx and YoueData. As a result, trade through has started receive attentions from both industry academia. During buying selling, how price is an indispensable problem. However, pricing incomplete more challenging, ...

Due to advancement in cloud computing technology, the research on the outsourced database has been spotlighted. In database outsourcing, because the service provider might be untrusted or compromised, two issues of data security emerge: data confidentiality and data integrity. Many data transformation schemes were widely studied for preserving data confidentiality, but they are vulnerable to da...