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Abstract—This paper presents a secure mobile health application which is based on hybrid cloud architecture combined with cryptographic techniques to protect privacy, integrity and security of patients and health care givers data and with role based access control to authenticate and authorize users. Hybrid cloud platform combines the advantages of both the private cloud which guarantees privacy and safety of data and the public cloud which provides a platform for reduced services costs. Integrating cryptography and role based access control with hybrid cloud computing ensures the safety of patients ’ medical records and enable user authentication and authorization for access control. This integrated technology can provide the mobile health care the required safety and privacy to flourish. Index Terms—Cloud computing, cryptography, cloud security, mobile health, hybrid cloud I