Highly secured cloud based personal health record model

Presently, cloud computing is widely used for storing, maintaining and sharing data. Sensitive files such as Personal Health Records are also outsourced to cloud and hence security is a major issue. Privacy and fine grained data access control are other risks in securing health records. User's valuable data should be secured so that they will entrust the Cloud Service Providers. Encryption is the most suitable option to protect sensitive records. In this paper Multi Authority and Key Policy Attribute Based Encryption techniques are used to encrypt health records after dividing these records to private and public domains. Further security is increased by providing session passwords to users and implementing session regeneration.