Results 201 to 210 of about 4,847 (258)

Distributed kNN Query Authentication

2018 19th IEEE International Conference on Mobile Data Management (MDM), 2018
With the prevalence of location-based services and geo-functioned devices, the trend of spatial data outsourcing is rising. In the data outsourcing scenario, result integrity must be ensured by means of a query authentication scheme. However, most of the existing studies are confined to a centralized environment. In this paper, we investigate the query
Jianliang Xu, Cheng Xu, Byron Choi
exaly   +2 more sources

Group Reverse kNN Query optimisation

Journal of Computational Science, 2015
Abstract Spatial queries have been used to assist human mobility. One of them is the Reverse Nearest Neighbour (RNN) Queries, which its concept is to have a set of objects that considers a query object as the nearest neighbour. One solution to the RNN queries is through region approach, which in this case every single object in the space has a ...
Kiki Maulana Adhinugraha, David Tâniar
exaly   +2 more sources

Inverted Voronoi-Based kNN Query Processing with MapReduce

2016 IEEE Trustcom/BigDataSE/ISPA, 2016
In mobile cloud computing environments distributed k Nearest Neighbor (kNN) query is an important issue. We consider the problem of processing kNN query over large data sets where the index is jointly maintained by a set of machines in a computing cluster.
Junfeng Wu, Zumin Wang, Changqing Ji
exaly   +2 more sources

Privacy Preserving kNN Spatial Query with Voronoi Neighbors

Advances in Intelligent Systems and Computing, 2019
With the increased demand for outsourcing databases, there is a demand to enable secure and efficient communications. The concern regarding outsourcing data is mainly providing confidentiality and integrity to the data. This paper proposes a novel solution to answering kNN queries at the cloud server over encrypted data.
Ibrahim Kamel   +2 more
exaly   +2 more sources

Efficient and Oblivious Query Processing for Range and kNN Queries (Extended Abstract)

2022 IEEE 38th International Conference on Data Engineering (ICDE), 2022
Zhao Chang   +2 more
exaly   +2 more sources

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