关键词: 大数据, 个人信息, 属性分析, 分级保护, 数据安全

Abstract: In recent years, the big data technology has been widely applied, which is of great significance for promoting the scientific and refined management decisions of the government and enterprises and improving the level of public services. However, the big data technology itself has many security risks, especially the problem of datasecurity, due to the data classification and classification protection mechanism is not perfect,which leads to frequent data leakage and abuse in the application of personal information. This paper analyzes the application status of personal information in big data, summarizes the security risk faced bypersonal information, meanwhile, this paper also analyzes the attributes of personal information, next, proposes the classification methods of personal information as well as the determination principles of its importance degree, then combined with the system data security protection level and safety assessment forms,finally the personal information safety protection requirements at all levels are also presented.

Key words: big data, personal information, attribute analysis, classification protection, data security