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MLDA: a multi-level k-degree anonymity scheme on directed social network graphs

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Abstract

With the emergence of network-centric data, social network graph publishing is conducive to data analysts to mine the value of social networks, analyze the social behavior of individuals or groups, implement personalized recommendations, and so on. However, published social network graphs are often subject to re-identification attacks from adversaries, which results in the leakage of users’ privacy. The k-anonymity technology is widely used in the field of graph publishing, which is quite effective to resist re-identification attacks. However, the current researches still exist some issues to be solved: the protection of directed graphs is less concerned than that of undirected graphs; the protection of graph structure is often ignored while achieving the protection of nodes’ identities; the same protection is performed for different users, which doesn’t meet the different privacy requirements of users. Therefore, to address the above issues, a multi-level k-degree anonymity (MLDA) scheme on directed social network graphs is proposed in this paper. First, node sets with different importance are divided by the firefly algorithm and constrained connectedness upper approximation, and they are performed different k-degree anonymity protection to meet the different privacy requirements of users. Second, a new graph anonymity method is proposed, which achieves the addition and removal of edges with the help of fake nodes. In addition, to improve the utility of the anonymized graph, a new edge cost criterion is proposed, which is used to select the most appropriate edge to be removed. Third, to protect the community structure of the original graph as much as possible, fake nodes contained in a same community are merged prior to fake nodes contained in different communities. Experimental results on real datasets show that the newly proposed MLDA scheme is effective to balance the privacy and utility of the anonymized graph.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 61966009, U22A2099).

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Authors and Affiliations

  1. Guangxi Key Laboratory of Trusted Software, Guilin University of Electronic Technology, Guilin, 541004, China

    Yuanjing Hao, Long Li & Liang Chang

  2. Engineering Research Center of Trustworthy AI (Ministry of Education), Jinan University, Guangzhou, 510632, China

    Long Li & Tianlong Gu

Authors
  1. Yuanjing Hao
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  2. Long Li
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  3. Liang Chang
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  4. Tianlong Gu
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Correspondence to Liang Chang.

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Competing interests The authors declare that they have no competing interests or financial conflicts to disclose.

Additional information

Yuanjing Hao received the BS degree in computer science and technology from Henan Normal University, China in 2019. She is currently a PhD candidate of Guilin University of Electronic Technology, China. Her research interests include information security and social network graph data privacy.

Long Li received the PhD degree from Guilin University of Electronic Technology, China in 2018. He is now a lecturer with the School of Computer Science and Information Security, Guilin University of Electronic Technology, China and undertakes postdoctoral research in Jinan University, China. His research interests include cryptographic protocols, privacy-preserving technologies, and AI ethics.

Liang Chang received the PhD degree in computer science from the Institute of Computing Technology, Chinese Academy of Sciences, China. He is currently a Professor with the School of Computer Science and Information Security, Guilin University of Electronic Technology, China. His research interests include information security, knowledge representation and reasoning, description logics, and the semantic Web.

Tianlong Gu received the PhD degree from Zhejiang University, China in 1996. From 1998 to 2002, he was a Post-Doctoral Fellow with the School of Electrical and Computer Engineering, Curtin University, Australia and a Research Fellow with the School of Engineering, Murdoch University, Australia. He is currently a Professor and the director of the Engineering Research Center of Trustworthy AI (Ministry of Education), Jinan University, China. His research interests include formal methods, trustworthy artificial intelligence, artificial intelligence ethics, and data governance.

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Hao, Y., Li, L., Chang, L. et al. MLDA: a multi-level k-degree anonymity scheme on directed social network graphs. Front. Comput. Sci. 18, 182814 (2024). https://doi.org/10.1007/s11704-023-2759-8

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