Hybrid Secure and Scalable Electronic Health Record Sharing in Hybrid Cloud

Cloud computing has become an integral part of theoperation of health. However, there are major security andprivacy issues in terms of accessing medical records from thehybrid cloud environment. In this paper, a new secure hybridElectronic Health Record system is proposed. In this framework, two efficient encryption methods are combined for fine grainedaccess control and protection of data privacy. Multi-authority andKey-based encryption schemes are used for the encryption of eachpart of health records after dividing those records using a verticalpartitioning method. Multi-authority encryption schemes areprimarily used in the Public Domains (PUDs), while Key-basedencryption schemes are prevalent in Personal Domains (PSDs). Together, they provide, secure data access and authentication ofusers. Implementation is facilitated using Windows Azure CloudComputing platform.