arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2007.05373cs.CRcs.CYcs.DBcs.DCcs.HC
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隐私保护众包平台中从任务调整到任务分配

From Task Tuning to Task Assignment in Privacy-Preserving Crowdsourcing Platforms

Joris Duguépéroux, Tristan Allard

摘要:

众包平台的专业化工作者简档可以包含大量的识别和可能敏感的个人信息(例如,个人偏好、技能、可用插槽、可用设备)引起强烈的隐私问题。这导致了保护隐私的众包平台的设计,旨在实现高效的众包流程,同时即使在平台不完全可信的情况下也能提供强有力的隐私保证。在本文中,我们提出了两个贡献。首先,我们提出了PKD算法的目标是支持各种各样的聚合使用的工人配置文件在一个隐私保护的众包平台。PKD算法将同态加密和差分隐私组合在一起,用于计算实际工人群体的多维技能空间的(扰动的)分区和每个分区的工人的(扰动的)数目。其次,我们建议受益于私人信息检索技术的最新进展,以设计一个解决方案,任务分配,是私人和负担得起的。我们进行了深入研究的问题,使用PIR技术提出任务的工人,表明它是NP-难的,并提出了PKD PIR包装启发式分组任务一起根据分区输出的PKD算法。简而言之,我们设计了PKD算法和PKD PIR Packing启发式算法,我们正式证明了它们对诚实但好奇的工人和/或平台的安全性,我们分析了它们的复杂性,并通过在合成和现实数据集上进行广泛的实验评估,证明了它们在现实生活中的质量和可负担性。

英文摘要:

Specialized worker profiles of crowdsourcing platforms may contain a large amount of identifying and possibly sensitive personal information (e.g., personal preferences, skills, available slots, available devices) raising strong privacy concerns. This led to the design of privacy-preserving crowdsourcing platforms, that aim at enabling efficient crowd-sourcing processes while providing strong privacy guarantees even when the platform is not fully trusted. In this paper, we propose two contributions. First, we propose the PKD algorithm with the goal of supporting a large variety of aggregate usages of worker profiles within a privacy-preserving crowdsourcing platform. The PKD algorithm combines together homomorphic encryption and differential privacy for computing (perturbed) partitions of the multi-dimensional space of skills of the actual population of workers and a (perturbed) COUNT of workers per partition. Second, we propose to benefit from recent progresses in Private Information Retrieval techniques in order to design a solution to task assignment that is both private and affordable. We perform an in-depth study of the problem of using PIR techniques for proposing tasks to workers, show that it is NP-Hard, and come up with the PKD PIR Packing heuristic that groups tasks together according to the partitioning output by the PKD algorithm. In a nutshell, we design the PKD algorithm and the PKD PIR Packing heuristic, we prove formally their security against honest-but-curious workers and/or platform, we analyze their complexities, and we demonstrate their quality and affordability in real-life scenarios through an extensive experimental evaluation performed over both synthetic and realistic datasets.

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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