31-08-2017, 12:50 PM
Personal health record systems (PHRs) play a vital role during the digital transformation of health care. These systems provide many value-added features such as viewing your health-related information, secure transmission, and tracking that information with health care providers. A cloud-assisted PHR system maximizes the possibility for PHR systems to interoperate with other systems in health information management environments. Each patient needs to encrypt their PHR data before uploading it into the cloud since patients will lose their physical access to their health data stored on cloud servers. On the other hand, achieving fine-grained data access control in encrypted PHR data in an efficient and scalable manner is a difficult task. Since multiple owners or patients are available in a PHR system and existing data access control systems are designed primarily for single authority / owner scenarios, a new patient-centered data access control scheme called Revocable Multi Authority Attribute Set Based Encryption - MA-ASBE). The proposed scheme inherits flexibility, scalability, and patient-centered patient-centered data access control.