Abstract
With China's implementing big data strategy, health care becomes one of the key areas in which the national big data strategy is highly promoted. However, as the health care big data industry grows rapidly, the security risk is increasingly prominent and the internet plus medical care makes the protection of health care big data more complicated. By analyzing the current situation of health care big data security protection, the article proposes the viewpoint of relative security and suggests the strategies and key issues of health care big data protection. From the aspects of legal supervision, talents cultivation, publicity and education, and key data protection, it is necessary to build the prevention and control system for health care big data security, so that the security risk can be reduced and the data utility can be maximized.