Abstract: The broad acknowledgment of cloud based services in the healthcare sector has brought about practical and helpful
trade of Personal Health Records (PHRs) among a few taking part elements of the e-Health systems. Nevertheless, putting
away the secret health data to cloud servers is susceptible to revelation or theft and requires the improvement of approaches
that guarantee the protection of the PHRs. Along these lines; we propose an approach called SeSPHR for secure sharing of
the PHRs in the cloud. The SeSPHR scheme ensures patient-centric control on the PHRs and preserves the classification of
the PHRs. The patients store the encrypted PHRs on the un-trusted in cloud servers and specifically grant access to various
kinds of clients on various parts of the PHRs. A semi-trusted in proxy called Setup and Re-encryption Server (SRS) is
acquainted with set up people in general/private key combines and to deliver the re-encryption keys. Besides, the strategy is
secure against insider threats and furthermore authorizes a forward and in reverse access control. Moreover, we formally
examine and check the working of SeSPHR strategy through the High Level Petri Nets (HLPN). Execution assessment in
regards to time utilization demonstrates that the SeSPHR strategy can possibly be utilized for safely sharing the PHRs in the
cloud.
Keywords: Access Control, Cloud Computing, Personal Health Records, Privacy.