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With the rapid development of portable mobile devices, crowd sensing systems have been recognized as a key technology to utilize the data collected by the portable mobile devices towards scalable and flexible mobile services. However, since the information provided by devices may not be reliable, the aggregated results of the collected data may not be accurate. To tackle this challenge, various truth...
With the growing popularity of outsourcing data and services to the cloud, performing queries on encrypted data becomes a promising technique. Searchable encryption (SE) allows encryption while still enabling search for a variety of data. However, most of the existing arts focus on rectangular range query on common database. Query on encrypted spatial database has not been well studied. Moreover,...
With the growing popularity of cloud computing, outsourced computing has attracted much research effort recently. A computationally weak client is capable of delegating its heavy computing tasks, such as large matrix multiplications, to the cloud server. Critical requirements for such tasks include the need to guarantee the unforgeability of computing results and the preservation of the privacy of...
Smart grid is a modern power grid that uses two-way communications between the control center and smart meters to improve efficiency, reliability, flexibility, security, and safety of the grid. Security is one of the critical requirements in smart grid, especially privacy and authentication due to the increase in the point of attacks and the fact that energy usage data can reveal personal information...
Cloud computing is emerging as a revolutionary computing paradigm which provides a flexible and economic strategy for data management and resource sharing. Security and privacy become major concerns in the cloud scenario, for which Searchable Encryption (SE) technology is proposed to support efficient keyword based queries and retrieval of encrypted data. However, the absence of personalized search...
With the in-depth study of smart grid, energy auction attracts a lot of attention due to its economic benefits. Many schemes have been proposed to support energy auction in smart grid. However, few of them achieve range query and ranked search. In this paper, we propose a ranked range query (RRQ) scheme, which can support both range query and ranked search. Based on the homomorphic Paillier cryptosystem,...
With the deployment of smart meters at individual households, smart grid can collect metering data of users' power consumption. However, users' power usage patterns would also be revealed. To preserve the users' privacy, metering data is mostly encrypted by cryptographic algorithms. When data mining is needed to support decision making or ensure reliability, to find useful information from the encrypted...
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