Anonymizing Network Addresses Based on Clustering Subnets

Yi Tang, Yuanyuan Wu
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Abstract

The network trace is a kind of fundamental data for networking researches. To preserve the privacy hidden in those traces, they must be sanitized before publishing them publicly. Many of the sanitization efforts are focused on anonymizing internal network addresses. In this paper, we propose a subnet-clustering based method to anonymize addresses. We adopt different strategies to anonymize different parts of the address. The network part is anonymized by a prefix-preserved anonymization method, the subnet part is generalized by clustering based on a predefined set of port numbers, and the host address is randomized. We also propose a measure based on information entropy to measure the degree of privacy-preserved in anonymized addresses and develop an entropy-guided algorithm to search the subnet clusters.
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基于集群子网的网络地址匿名化
网络轨迹是网络研究的一种基础数据。为了保护隐藏在这些痕迹中的隐私,它们必须在公开发布之前进行清理。许多清理工作的重点是匿名化内部网络地址。本文提出了一种基于子网聚类的地址匿名化方法。我们采用不同的策略对地址的不同部分进行匿名化。网络部分采用保留前缀的匿名化方法进行匿名化,子网部分采用基于预定义端口号集的聚类方法进行泛化,主机地址采用随机化方法。我们还提出了一种基于信息熵的度量方法来度量匿名地址的隐私保护程度,并开发了一种熵导向的算法来搜索子网集群。
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