Priya.C, Chandra Sekaran.S
Personal Health Record is an emerging patient – centric model of health information exchange, which is often outsourced to be stored at the third party, such as cloud providers. However, there have been wide privacy concerns as personal health information could be exposed to those third party servers and to unauthorized parties. To assure the patients control over access to their own, it is a promising method to encrypt the health records before outsourcing. Yet, issue such as risks of privacy exposure, scalability in key management, flexible access, and efficient user revocation, have remained the most important challenges toward achieving fine-grained, cryptographically enforced data access control. In this paper, we propose novel patient centric framework. This paper is to address this important problem and design for health record in privacy of the involved parties and their data’s. Different from previous works in secure data outsourcing, we focus on the multiple data owner scenario, and divide the users in the Health record systems into multiple security domains that greatly reduce the key management complexity for owners and users. A high degree of patient privacy is guaranteed simultaneously by exploiting multi-authority .Our scheme also enables dynamic modification of access policies or file attributes, supports efficient on-demand user/attribute revocation and break-glass access under emergency scenarios.
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