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Review of key management technologies for trusted data spaces
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Tao Zhang1, 2, Zixi Liu1, Shuang Tian1, Xiangyun Tang3, *, Jiawen Kang4, Xuangou Wu5, Jiqiang Liu1
Journal of Cybersecurity | 2026, 4(3) : 13 - 26
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Journal of Cybersecurity | 2026, 4(3): 13-26
• Academic Research •
Review of key management technologies for trusted data spaces
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Tao Zhang1, 2, Zixi Liu1, Shuang Tian1, Xiangyun Tang3, *, Jiawen Kang4, Xuangou Wu5, Jiqiang Liu1
Affiliations
  • 1School of Cyberspace Security, Beijing Jiaotong University, Beijing 100044, China
  • 2National Key Laboratory of Internet Architecture, Tsinghua University, Beijing 100084, China
  • 3School of Information Engineering, Minzu University of China, Beijing 100081, China
  • 4School of Automation, Guangdong University of Technology, Guangzhou 510006, China
  • 5School of Computer Science and Technology, Anhui University of Technology, Maanshan 243032, China
Published: 2026-06-30 doi: 10.20172/j.issn.2097-3136.260527
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Trusted data space is a core infrastructure for secure data circulation. With the development of the digital economy, higher security requirements have been put forward for data storage, transmission and sharing in trusted data spaces. Cryptographic technology can provide strong security support for the development of trusted data spaces in terms of distributed deployment, scalability and cross-domain collaboration. Based on a comprehensive review of domestic and foreign research on key management for trusted data spaces, this paper conducts a review from three dimensions: key management architecture and mechanism, key full-life-cycle management, and cross-domain authentication and security negotiation. This paper mainly analyzes hierarchical, distributed and lightweight key mechanisms, as well as key technologies including key update, key escrow and proxy re-encryption, and summarizes the mainstream methods of cross-domain authentication and group key negotiation. Furthermore, the deficiencies of existing researches in dynamic adaptation capability and cross-domain collaboration efficiency are summarized. Finally, the future development directions of trusted data spaces such as adaptive key management and intelligent secure key management are prospected.

trusted data space  /  key management  /  cross-domain authentication  /  proxy re-encryption  /  secure negotiation
Tao Zhang, Zixi Liu, Shuang Tian, Xiangyun Tang, Jiawen Kang, Xuangou Wu, Jiqiang Liu. Review of key management technologies for trusted data spaces[J]. Journal of Cybersecurity, 2026 , 4 (3) : 13 -26 . DOI: 10.20172/j.issn.2097-3136.260527
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doi: 10.20172/j.issn.2097-3136.260527
  • Online Date：2026-08-27
  • Published：2026-06-30
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Affiliations
    1School of Cyberspace Security, Beijing Jiaotong University, Beijing 100044, China
    2National Key Laboratory of Internet Architecture, Tsinghua University, Beijing 100084, China
    3School of Information Engineering, Minzu University of China, Beijing 100081, China
    4School of Automation, Guangdong University of Technology, Guangzhou 510006, China
    5School of Computer Science and Technology, Anhui University of Technology, Maanshan 243032, China
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