Smart City refers to the use of various information technologies or innovative ideas to integrate urban constituent systems and services to improve the efficiency of resource utilization, optimize urban management and services, and improve the quality of life of citizens.

With the development of IoT technology, a large amount of data is constantly being exchanged and transmitted every minute and second every day, which is used as the basis for artificial intelligence, big data analysis, blockchain, and machine learning and other digital technologies, but then the data is derived Relevant issues such as security protection, data management, and privacy protection policies should have more sound planning and protection, in order to respond to technological changes of the times.

Information security is the most important issue in the Internet era. The concept of "zero trusts" and "zero trust architecture", which never trust, must be verified and quickly adopted.

Faced with various security threats, the internal network environment and the personal computers managed by the company are likely to be attacked and paralyzed, hacked, or even become the perpetrator. There is no distinction between inside and outside. Therefore, zero-trust management mode is imperative.