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As cloud computing is increasing in popularity, it is difficult to both maintain privacy in datasets while still providing adequate retrieval and searching procedures. This paper introduces a novel approach in the field of encrypted searching that allows both encrypted phrase searches and proximity ranked multi-keyword searches to encrypted datasets on untrusted cloud. By storing encrypted keyword-location data along with specially truncated encrypted keyword indexes in a relational database, the people are able to allow for a full range of search features in their encrypted searches, something that has never been accomplished before.
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