Secured Multi-keyword Ranked Search over Encrypted Cloud Data

Computer Engineering

To design search schemes which allow multi-keyword query and provide result similarity ranking for effective data retrieval, instead of returning undifferentiated result. To enable ranked search for effective utilization of out-sourced cloud data under the system and threat model, system design should simultaneously achieve security and performance guarantees of Multi-keyword Ranked Search, Privacy-preserving, Efficiency.“Co-ordinate matching” is an intermediate similarity measure which uses the number of query keywords appearing in the document to quantify the relevance of that document to the query. This technique treats encrypted data as documents and allows a user to securely Search through a single keyword and retrieve documents of interest. Although some recent designs have been proposed to support multi-keyword ranked search over encrypted cloud data (MRSE) search attempt to enrich the search flexibility, they are still not sufficient to provide users with acceptable result ranking functionality. To prevent the cloud server from learning additional information from the data set and the index, and to meet privacy requirements. Such as data privacy, index privacy, keyword privacy, trapdoor unlinkability, access pattern.

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