SCALABLE AND SECURE SHARING OF PERSONAL HEALTH RECORDS IN CLOUD COMPUTING USING ATTRIBUTE-BASED ENCRYPTION

Personal Health Record (PHR) holds a great position as it centralizes the server to preserve a patient's personal health record in a centralized way which greatly facilitates the storage, access and sharing of personal health data. Still, there is a considerable privacy problem as personal health information is probably exposed to thirdparty servers and unauthorized parties. To guarantee the patients control over their PHRs, a method to encrypt the PHRs before storing them on cloud is practiced. But still issues like risks of privacy, efficiency in key administration, flexible access and efficient user administration, have remained the important challenges toward achieving better, cryptographically imposed data access control. In this research paper, we developed a mechanism for control of data access to PHRs stored in cloud servers using ABE encryption approach to encrypt each PHR file. In this proposed article we specialize in the multiple data owner scheme, and divide the users into security domains that highly reduce the key management complication for owners and users. In this system patient privacy is promised by exploiting multi-authority ABE. Our system also enables a key management paradigm, multiple data owner scenarios and increased complexity between data and end-users. Extensive analysis and experimental results are presented which shows the safety and efficiency of our proposed scheme.