International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Cloud data have to be encrypted to protect data privacy, before outsourced to the commercial public cloud. The encryption process makes effective data utilization service a very challenging task. Traditional searchable encryption techniques allow users to securely search over encrypted data through keywords. They support only Boolean search and are not yet sufficient to meet the effective data utilization need that is inherently demanded by large number of users and huge amount of data files in cloud.