Table 3.

Data security strategy of the big data platform.

Security classification	Security level	Descriptions	Examples	Precautions
Level 1	Most confidential	Hypersensitive information	Financial data, personal authentication data	A specified environment for a specified single individual to use
Level 2	Confidential	Highly sensitive information	Credit data, personal health privacy data	A specified environment for a specified single role to use
Level 3	Secret	General sensitive information	Personal information during diagnosis and treatment, contract information, employee management data of employees	Use after the role group is authorized
Level 4	Internal use only	Information that is not publicly disclosed	Organizational structure, basic information of employees, general data after desensitization	Use after internal authorization
Level 5	Open to the public	Data that can be publicly disclosed	Summarized results obtained by statistical analysis	Public access or use