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2019 | OriginalPaper | Buchkapitel

Greedily Remove k Links to Hide Important Individuals in Social Network

verfasst von : Jie Ji, Guohua Wu, Chenjian Duan, Yizhi Ren, Zhen Wang

Erschienen in: Security and Privacy in Social Networks and Big Data

Verlag: Springer Singapore

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Abstract

Closeness centrality is a type of measure that usually used in social network analysis (SNA). For personal privacy, we study how to help important individuals avoid being detected by closeness centrality analysis. In this paper, we present an optimization problem of finding k edges removed to minimize leader node closeness value to hide leader. We consider this problem in the undirected graph and prove its NP-completeness by reduction from the Hamiltonian cycle problem. Hence, we propose a greedy algorithm with a \((1-\frac{1}{e})\) - approximation lower bound and design UpdateCloseness algorithm to reduce time cost by Breadth-First Search algorithm. Experimental results confirm the effectivity of our greedy scheme.

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Metadaten
Titel
Greedily Remove k Links to Hide Important Individuals in Social Network
verfasst von
Jie Ji
Guohua Wu
Chenjian Duan
Yizhi Ren
Zhen Wang
Copyright-Jahr
2019
Verlag
Springer Singapore
DOI
https://doi.org/10.1007/978-981-15-0758-8_17

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