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To preserve the private information of the outsourced database, it is important to encrypt the database. Also it is necessary to provide a query processing scheme without decrypting the encrypted data. For this, we propose a group order preserving data encryption scheme based on periodic functions (GOPES). Our GOPES generates encryption signatures based on data groups and periodic functions. With...
Wireless sensor networks (WSN) are widely used in the various monitoring systems. When implementing WSN-based monitoring systems, there are three important issues to be considered. At first, we should consider a node failure detection method to provide continuous monitoring. Secondly, because sensor nodes use limited battery power, we need an efficient data filtering method to reduce energy consumption...
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