Abstract: Against the backdrop of the deepening development of the digital economy, researching the security of trustworthy data spaces is of great significance for enhancing the data protection level of critical information infrastructure and promoting the highquality development of the datafactor market. This study systematically analyzes the development status of data spaces in the United States, the European Union and Japan. Building on international experience, it focuses on industrial sectors, examining the development landscape and existing challenges of data space security in each field. The study proposes policy recommendations, including strengthening the legal and regulatory framework for data spaces, advancing breakthroughs in core technologies, fostering diverse application scenarios and market ecosystems, optimizing the supply structure, and enhancing international cooperation. These proposals aim to ensure the secure circulation of data as a production factor and to promote the highquality development of the data factor market.

Key words: critical information infrastructure, data space, security, trusted data space, industry analysis

摘要： 在数字经济向纵深演进的背景下，研究可信数据空间安全对提升关键信息基础设施的数据保护水平与推动数据要素市场高质量发展具有重要意义.系统分析了美国、欧盟、日本等国家和组织的数据空间发展现状，并深入剖析我国不同行业领域数据空间安全的发展格局与现存挑战，从完善数据空间政策法规、推进核心技术突破、培育多元应用场景与市场生态、完善供给结构体系及构建国际合作体系等方面提出政策建议，为保障数据要素安全流通、推动数据要素市场高质量发展提供支撑.

关键词: 关键信息基础设施, 数据空间, 安全, 可信数据空间, 行业分析