Cloud computing is a modern as well as advanced computing technology, which provides flexible, on-demand, and low-cost usage of computing resources, but the information is outsourced to some cloud server providers, and various privacy concerns emerge from it. Different techniques based on the attribute-based encryption have been proposed to secure the cloud storage. Sharing of personal health record is an emerging patient centric model of health data exchange which is often outsourced by the third party such as cloud server. The confidentiality of the personal record is major problem when patient use commercial cloud server to store their health records, it can be viewed anyone is the Attribute-Based Encryption (ABE) has emerged as a promising platform providing end-to-end data security and privacy in cloud storage system. It allows data owners to define access policies and encrypt the data under the policies, such that only users whose attributes satisfying these access policies can decrypt the data. We also leverage Windows Communication Foundation (WCF) Technique that allows secure communication or exchange of data in real time. Personal Health Record (PHR) contains the details of the patient health which is monitored and handled by the patients and they can add, delete, and modify their own record.

Cloud computing PHR system Web Services WCF and Base-64.