关键词: 数字孪生城市, 城市大数据平台, 数据安全流转周期, 数据流转安全框架, 数据治理安全域

Abstract: The digital twin city big data platform can promote the aggregation of smart city data resources, comprehensively promote the cross domain integration application of government data and social data, open up data circulation channels, avoid isolated islands, and innovate the open system of data management, sharing and data transaction service system. This paper proposes a big data flow security framework based on city big data platform, aiming at the security difficulties in the process of digital twin city data flow, such as various data formats involved in city big data platform data sources, diverse application data exchange requirements, complex system permission system, uncontrollable cross domain extension and so on, According to the time and space dimensions of data security flow cycle and data governance security domain, the data security flow system is constructed to solve the security problems of multisource heterogeneous, cross network and cross platform exchange and sharing of digital twin city data.

Key words: digital twin city, city big data platform, data security circulation cycle, data flow security framework, data governance security domain