Fine-grained Access of Personal Health Record in Cloud Computing

Cloud computing is used broadly in various services which maintain Personal Health Record (PHR). It is an emerging Health-centric model of patient health information interchange. Personal Health Record (PHR) information can be stored in a third party server i.e.Cloud server. The most important issues are fine–grained access, cryptographically enforced data access control, scalability in key management and efficient on-demand user revocation. We need to provide the security for the cloud based PHR information. This paper mainly concentrates on the multiple data owner scenario and divides the user into multiple security domains that significantly reduces the key management problems. A high level security of patient privacy is improved simultaneously by developing Multi-Authority Attribute Based Encryption (MAABE). We have a tendency to enhance the already existing format of PHR knowledge (template) into a secure format (PDF), GIF, DOC and set access privileges. Before taking a key to decrypt the PHR record in multiple owner scenarios it should raise some security questions on PHR owner.