Blockchain-based Privacy Preservation Framework for Healthcare Data in Cloud Environment

The extensive use of electronic healthcare systems (eHealth) already has significant advantages in the management of electronic based Health Records called EHRs for both Clinicians and Clients of hospitals.It does, however, present significant security issues.After a medical institution creates and redirects it to cloud servers, patients will not be provided with physical access to EHR but, if diagnosed, will be given access by the medical institution.The integrity of the EHRs is therefore difficult to maintain, especially in the event of medical error, as the cloud platform allows the health institute to manipulate outside EHRs to cover up health misconduct.