International Journal for Development of Computer Science & Technology (IJDCST)
Now-a-days, cloud computing is the main data source for storing information. The only problem is data security. In other words more number of approaches is introduced for secured data in cloud. In previous techniques the authors define and solve the problem of secure ranked keyword search over encrypted cloud data. Ranked search greatly enhances system usability by enabling search result relevance ranking instead of sending undifferentiated results, and further ensures the file retrieval accuracy. Specifically, they explore the statistical measure approach, i.e. relevance score, from information retrieval to build a secure searchable index, and develop a one-to-many order-preserving mapping technique to properly protect those sensitive score information.