Abstract
This chapter aims to discuss healthcare's development in China and the privacy and security risk factors in medical data under big data. First, the development status of China's healthcare sector is analyzed. The questionnaire is made to analyze the privacy and security risk factors of healthcare big data (HBD) and protection measures are proposed according to the data privacy and security risk factors in the context of cloud services in the literature. The results show that in recent years, the number of health institutions and medical personnel, the assets of medical institutions, the per capita hospitalization cost, and the insured population all increase annually. In 2017, the crude mortality rate of malignant tumor patients was the highest in China, and the mortality rate of rural patients was higher than that of urban patients. The questionnaire results reveal that the probability of data analysis, medical treatment process, disease diagnosis process, lack of protective measures, and imperfect access system are all greater than 0.8 when HBD is oriented to cloud services. Based on this, two levels of privacy protection measures are proposed: technology and management. It indicates that medical institutions need to emphasize data privacy protection and grasp using digital medical data to provide decision support for subsequent medical data analysis.
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