A Secure and Dynamic Multi-Keyword Ranked Search Scheme over Encrypted Cloud Data

Mobile cloud computing has entered a new era of technology which would help in keeping large quantity of data in a lesser cost. Platforms for accessing and computing of large amount of data are much more viable than previous days. Researchers have been using large volumes of data for producing out puts and they consider data as an asset. Now a days data is being outsourced for conducting research in different sectors like market study, military purposes, tackling terrorist attacks ,whether forecasting etc this increased the value of data and it has to be kept safe. To preserve the nature of data high level encryption should be done while transferring the data but this may cause problems when multiple users try to access data from a cloud source. Researchers are trying to develop new encryption technique to reduce the risk of security while transferring the data. Solutions that are being discussed are a multi keyword search scheme supporting result ranking by adopting k nearest neighbors knn technique and another is a dynamic searchable encryption scheme through blind storage to conceal access pattern of the search user. Searching the encrypted data should be easy and should provide an easy feeling like using a search engine in the internet. It should also support multi key word search easy identification of relevant search result. The data base would be large the searchable encryption scheme should be in such a way that it would result in minimum delay. The ideal scheme for providing better performance is a multi keyword ranked search.