While personal health record service is to be shifted to cloud computing, successful factors can be security and privacy protection and service efficiency. In this study, we propose a framework coherently employing the symmetric key cryptography and identity-based cryptography that offers a secured, private and full access control of relevant data to the owners of the personal health records, without sacrificing the cloud service performance. Moreover, the proposed framework is implemented as a separated cloud computing service in order to have better user trusts.
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