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arXiv 2103.00996cs.CR
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非对称差分隐私

Asymmetric Differential Privacy

Shun Takagi, Yang Cao, Masatoshi Yoshikawa

摘要:

差分隐私(DP)作为发布数据集统计信息时的隐私定义越来越受到关注。本文重点关注DP不可避免地导致双侧误差的局限性,这对于流行病分析(例如有多少COVID-19感染者访问了地点A)是不可取的。例如,考虑发布许多感染者没有访问地点A的错误信息,这可能导致扩大疫情的决策失误。为了解决这个问题,我们提出了一个放松DP,称为非对称差分隐私(ADP)。我们表明,ADP可以提供合理的隐私保护,同时实现片面的错误。最后,我们进行了实验,以评估使用真实世界的数据集,这表明我们的机制的实用性的流行病分析机制的效用。

英文摘要:

Differential privacy (DP) is getting attention as a privacy definition when publishing statistics of a dataset. This paper focuses on the limitation that DP inevitably causes two-sided error, which is not desirable for epidemic analysis such as how many COVID-19 infected individuals visited location A. For example, consider publishing misinformation that many infected people did not visit location A, which may lead to miss decision-making that expands the epidemic. To fix this issue, we propose a relaxation of DP, called asymmetric differential privacy (ADP). We show that ADP can provide reasonable privacy protection while achieving one-sided error. Finally, we conduct experiments to evaluate the utility of proposed mechanisms for epidemic analysis using a real-world dataset, which shows the practicality of our mechanisms.

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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