A Comprehensive Review on Secure Data Sharing in Cloud Environment

Cloud computing is a constantly evolving archetype since web 2.0. Though it’s a popular IT buzzword and concepts are derived from decade old grid computing, distributed computing, utility computing and intensive application computing. It offers a broader range of services such as virtual machines (VMs), servers, storage devices, operating systems (OS),network resources over the internet to its users on ‘pay-for-usage’ basis. Dynamic group data sharing were users anonymously share his/her data with other group members over cloud could compromise security hence there is need to design an efficient, secure data sharing in dynamic group. Hence, this review paper presents various problems and challenges in designing an effective dynamic group data sharing. The problems and challenges are classified based on Client based and service provider based were client-based problems includes user authentication, user privacy and security, data confidentiality & integrity and query cost and service provider based problems includes user’s identity & traceability, user revocation, energy efficiency and performance. Based on the challenges, researchers have proposed and developed various protocols, management and control mechanisms under data security, access control, query grouping and energy efficiency headings which is briefly summarised in this review to help future researchers in developing efficient, security data sharing schemes in cloud environment.