Security and Privacy Preservation of Electronic Health Records in Cloud

As the world moves towards digitalization, outsourcing electronic health record (EHR) to the cloud has become an increasing trend; thus, medical information can be made available to researchers for data analysis, as well as to healthcare providers for providing personalized health benefits to patients.Medical information is sensitive in nature and the cloud contains numerous vulnerable, sensitive, and outsourced data for public access; therefore, the security of cloud premises and privacy preservation of data owners are major concerns for researchers.Various schemes have been proposed to ensure data security and privacy on the cloud.This study presents a systematic review of the state-of-the-art schemes designed for the security and privacy preservation of EHR.The features of the schemes and their associated challenges are also discussed.This study concludes with potential future directions for preserving the privacy of EHR in the cloud.