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arXiv 1208.0220cs.DB
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发布具有强大隐私保证的微数据

Publishing Microdata with a Robust Privacy Guarantee

Jianneng Cao, Panagiotis Karras

摘要:

今天,微数据的发布构成了隐私威胁。大量的研究都在努力定义微数据在发布之前应该满足的隐私条件,并设计算法来匿名化数据以实现这一条件。然而,到目前为止,还没有提出任何方法来明确限制对手在看到其中每个敏感值的发布数据后获得的信息的百分比。本文介绍了Beta相似性,适当的强大的隐私模型的微数据匿名化,以及两个匿名化方案,一个基于泛化,另一个基于扰动设计。我们的模型假设,对手的信心的可能性,一定的敏感属性(SA)值不应该增加,在相对差异方面,超过一个预定义的阈值。我们的技术旨在满足一个给定的beta阈值,几乎没有信息损失。我们的实验表明,(i)我们的模型提供了一个有效的隐私保证的方式,前辈模型不能,(ii)我们的推广计划是更有效和高效的,在其任务比方法适应算法的k-匿名模型,(iii)我们的扰动方法优于基线方法。此外,我们详细讨论了我们的模型和方法的抵抗力,在以前的研究中提出的攻击。

英文摘要:

Today, the publication of microdata poses a privacy threat. Vast research has striven to define the privacy condition that microdata should satisfy before it is released, and devise algorithms to anonymize the data so as to achieve this condition. Yet, no method proposed to date explicitly bounds the percentage of information an adversary gains after seeing the published data for each sensitive value therein. This paper introduces beta-likeness, an appropriately robust privacy model for microdata anonymization, along with two anonymization schemes designed therefor, the one based on generalization, and the other based on perturbation. Our model postulates that an adversary's confidence on the likelihood of a certain sensitive-attribute (SA) value should not increase, in relative difference terms, by more than a predefined threshold. Our techniques aim to satisfy a given beta threshold with little information loss. We experimentally demonstrate that (i) our model provides an effective privacy guarantee in a way that predecessor models cannot, (ii) our generalization scheme is more effective and efficient in its task than methods adapting algorithms for the k-anonymity model, and (iii) our perturbation method outperforms a baseline approach. Moreover, we discuss in detail the resistance of our model and methods to attacks proposed in previous research.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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