Distributed Attribute Based Encryption for Patient Health Record Security under Clouds

摘要

Patient Health Records (PHR) is maintained in the centralized server to maintain the patient’s personal and diagnosis information. The patient records should be maintained with privacy and security. The privacy mechanism protects the sensitive attributes. The security schemes are used to protect the data from public access. Patient data can be accessed by different people. Each authority is assigned with access permission for a set of attributes. The data access control and privacy management is a complex task in the patient health record management process. Cloud computing environment supports storage spaces for patient health record management process. Data owners update the patient data into third party cloud data centers. The attribute based encryption (ABE) scheme is used to secure the patient records for selected sensitive attributes. Multiple owners can access the same data values. The Multi Authority Attribute Based Encryption (MAABE) scheme is used to provide multiple authority based access control mechanism. The MAABE model is not tuned to provide identity based access mechanism. Distributed storage model is not supported in the MAABE model. The proposed system is designed to provide identity based encryption facility. The attribute based encryption scheme is enhanced to handle distributed attribute based encryption process. Data update and key management operations are tuned for multi user access environment.