Comparison of different techniques for keyword searching over encrypted data

Since it is necessary to store data on different storage devices so to have privacy and security. It is desirable to encrypt the data before storing them. Since data is stored in a third party storage device in encrypted form it is very difficult to search data in its encrypted form. Thus making the retrieval process is difficult in large scale databases. In this paper we study and compare different techniques for key word search on encrypted data and we study and analyze their efficiency and security provided by them.