Abstract: At present, there are still many problems to be solved in government data sharing, such as the mismatch between data demand and supply, the weakness of data security and personal privacy protection, and the difficulty of business collaboration.By analyzing the current operation mechanism of government data sharing, combined with the theory of privacy computing technology, this paper proposes a data sharing model.This model adopts the method of "computable but invisible" to carry out data sharing,  gives the data sharing and system security architecture based on privacy computing.This model includes two main application processes: data statistical analysis and anonymous query.This model has theoretical and application value for better supporting data sharing with high security management requirements.

Key words: privacy computing, data sharing, homomorphic encryption, security model, sharing framework

摘要： 当前政务数据共享中仍存在的数据需求和数据供给不匹配、数据安全保护和个人隐私保护薄弱、业务协同难等诸多亟待解决的问题。本文通过分析当前政务数据共享的运行服务机制，结合隐私计算技术的理论，提出基于隐私计算技术的数据共享模型，采用“可算不可见”的方式开展数据共享，给出基于隐私计算的数据共享总体架构，系统安全模型，并提出基于隐私计算进行数据统计分析和匿名查询两个主要应用流程。该模型对更好支撑安全管理要求高的重要数据的共享工作具有较好的理论和应用价值。

关键词: 隐私计算, 数据共享, 同态加密, 安全模型, 共享框架