An Extensive Survey on Data Authentication Schemes in Cloud Computing

Cloud computing is a rising innovation in appropriated processing which encourages pay per model according to client request and prerequisite. Cloud comprises an accumulation of virtual machine which incorporates both computational and storeroom. The essential point of cloud computing is to give effective access to remote and geologically disseminated assets. Data Security is the main issue in almost all information system. Cloud computing is a modern advancement in information technology and application are facilitated to users as "Services". In cloud computing data is distributed and scattered in various places so, Data Security is the main problem in a cloud environment. Lots of work already done in securing the cloud data, data security is still the main obstacle to the development of cloud environment. This paper reviews the various security challenges and techniques to implement security for the purpose of achieving data protection in a cloud environment.