Searchable Encryption: A Review

Abstract

Cloud computing is one of the most important technologies which supports reliability, scalability, ease of deployment and cost-efficient to business growth. Despite its benefits, cloud computing still has open and remain challenges on ensuring confidentiality, integrity, and availability (CIA) of sensitive data located on it. As a solution, the data is encrypted before sending to the cloud. However, the normal searching mechanism could not get through the encrypted data. In this paper, Searchable Encryption (SE) techniques which allow accessing data on encrypted cloud were reviewed. Nine SE techniques were presented with different issues and challenges on achieving secrecy and efficiency of SE. Four factors with their characteristics of SE were also identified for novice reader as a guidance of their future works.