关键词: 智慧城市, 网络安全威胁, 网络安全保障, 网络安全评价, 评价指标

Abstract: In recent years, the construction of Chinas smart city has made positive progress, but also exposed the risks of cyber security. Smart city cyber security system needs to be established in order to guarantee the infrastructure network and key information system secure and controlled, critical information resource security effectively protected, residents information, business information and government information effectively protected. In this paper, cyber security threats faced by smart city are analyzed, and the reference architecture of smart city cyber security is proposed based on the system engineering approach. Besides, a comprehensive and practical evaluation system of smart city cyber security assurance is built from aspects of strategic planning, management organization security, business operation support and security technology through the method of targetlevel expansion. Moreover, the process model of smart city cyber security assurance is studied, to enhance cyber security management of smart city and to ensure smart city cyber security providing longterm method reference.

Key words: smart city, cyber security threat, cyber security assurance, cyber security evaluation, evaluation index