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In big data era, data are usually stored in databases for easy access and utilization, which are now woven into every aspect of our lives. However, traditional relational databases cannot address users' demands for quick data access and calculating, since they cannot process data in a distributed way. To tackle this problem, non-relational databases such as MongoDB have emerged up and been applied...
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...
To preserve privacy, sensitive data in cloud computing needs to be encrypted before outsourcing, which obstacles data utilization based on plaintext search. Thus there spring up several secure schemes which enable encrypted cloud-data search. However, these single-cloud-supported search schemes would suffer from service failure, inefficient application, and privacy problem when they are applied to...
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 application of wireless sensor networks, many applications not only have ease of installation, reliable data transfer, short-range operation, and extremely low cost and reasonable battery life, whilst maintaining a simple and flexible protocol, but also should have high confidentiality. So the research of the security of the IEEE 802.15.4 is becoming very important. The IEEE 802.15.4 specification...
ZigBee is a wireless technology developed as an open global standard. With the application of wireless sensor networks, many applications not only have low-power, low-complexity and cost-effective, but also should have high confidentiality. So the research of the security of ZigBee is becoming very important. Based on the ZigBee network protocol stack structure, in this paper, we mainly discuss the...
Standard identity-based encryption schemes typically rely on the assumption that secret keys are kept perfectly secure. However, with more and more cryptographic primitives are deployed on insecure devices, key exposure seems inevitable. In this paper, we propose an Identity-based encryption scheme with forward security. In the scheme, secret keys are updated at regular periods of time; furthermore,...
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