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Searchable encryption is an important research area in cloud computing. However, most existing efficient and reliable ciphertext search schemes are based on keywords or shallow semantic parsing, which are not smart enough to meet with users’ search intention. Therefore, in this paper, we propose a content-aware search scheme, which can make semantic search more smart. First, we introduce conceptual...
Enterprises outsourcing their databases to the cloud and authorizing multiple users for access represents a typical use scenario of cloud storage services. In such a case of database outsourcing, data encryption is a good approach enabling the data owner to retain its control over the outsourced data. Searchable encryption is a cryptographic primitive allowing for private keyword based search over...
To mitigate the damages of key-exposure, Dodis, Katz, Xu, and Yung, in Eurocrypt 2002, proposed a new paradigm called key-insulated security which provides tolerance against key exposures. Recently many identity-based key insulated signatures schemes have been proposed, however the problem of key escrow is inherent in this setting. To overcome this problem, certificateless public key cryptography...
Portfolio optimization plays a critical role in determining portfolio strategies for investors and it is intrinsically a discrete multiobjective optimization problem whose decision criteria conflict with each other. This paper extends a novel numerical multiobjective optimization algorithm, so-called multiobjective extremal optimization (MOEO), to solve the portfolio optimization problem. The proposed...
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