Efficient privacy-preserving keyword search method for retrieving data from cloud

Abstract

A Large number of data owners have moved their data into cloud servers for their convenience for multiprocessing, where secret and sensitive data must be encrypted first and then they are stored into cloud for privacy. Keyword based search is the common method used to access data from the cloud, in this paper the secure multi keyword ranked search method is implemented for providing additional privacy and efficiency, which has accessible operations such as updation, deletion, insertion of words. These operations are used to get the files from cloud server with minimum retrieval time. Data owners gather up large volumes of data and store it in cloud servers for future purpose, later users make use of those data. Data owners are allowed into the cloud server only after they are authenticated succesfully and are also permitted to create their own web pages. For the storage and retrieval of data from cloud server, Blowfish algorithm is generally used in encryption and decryption purpose. Sublinear search time and efficiency is increased.