Abstract-Recent years have witnessed a widespread availability of electronic healthcare data record (EHR) systems. Vast amounts of health data were generated in the process of treatment in medical centers such hospitals, clinics, or other institutions. To improve the quality of healthcare service, EHRs could be potentially shared by a variety of users. This results in significant privacy issues that should be addressed to make the use of EHR practical. In fact, despite the recent research in designing standards and regulations directives concerning security and privacy in EHR systems, it is still, however, not completely settled out the privacy challenges. In this paper, a systematic literature review was conducted concerning the privacy issues in electronic healthcare systems. More than 50 original articles were selected to study the existing security approaches and figure out the used security models. Also, a novel Context-aware Access Control Security Model (CARE) is proposed to capture the scenario of data interoperability and support the security fundamentals of healthcare systems along with the capability of providing fine-grained access control.
Abstract-During the treatment process, medical institutes collect context information about their patients and store it in their healthcare systems. The collected information describes the measurable, risk, or medication information and used to improve the performance of the institutes healthcare systems by allowing diverse knowledge about patients. Being said that some other information is needed as they influence patients' life style such as education and income as the high level of education or income reflected positively to the patient's life, and probably resulting in reducing likelihood disease or incidence of infectious diseases. In this paper, a new type of healthcare context information (Social Context) is proposed to address this need. It can be divided into four main categories: related people, behavior, income and education of the patient. We believe that the new proposed context information should be considered in the designing process of the context-aware medical informatics systems beside to the well-known context information.
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