arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1904.04475cs.CRcs.AIcs.DBcs.DS
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私有层次聚类与有效近似

Private Hierarchical Clustering and Efficient Approximation

Amazon Web Services(亚马逊网络服务);Hong Kong University of Science and Technology(香港科技大学);Northeastern University(东北大学);Stevens Institute of Technology(斯蒂文斯理工学院)

Xianrui Meng, Dimitrios Papadopoulos, Alina Oprea, Nikos Triandopoulos

摘要:

在协作学习中,多方贡献他们的数据集,以联合推断用于许多预测任务的全局机器学习模型。尽管其有效性,这种学习范式未能涵盖涉及高度敏感数据的关键应用领域,例如医疗保健和安全分析,其中隐私风险限制实体仅使用自己的数据集单独训练模型。在这项工作中,我们的目标是隐私保护的协作层次聚类。我们引入了一个正式的安全定义,旨在实现效用和隐私之间的平衡,并提出了一个双方协议,证明满足它,然后我们扩展我们的协议:(i)一个优化的版本的单链接聚类,和(ii)可扩展的近似变量。我们实现了我们所有的计划,并在合成和真实数据集上实验评估了它们的性能和准确性,获得了非常令人鼓舞的结果。例如,对于超过1M的10维数据样本,我们的安全近似协议的端到端执行需要35秒的计算,并达到97.09%的准确率。

英文摘要:

In collaborative learning, multiple parties contribute their datasets to jointly deduce global machine learning models for numerous predictive tasks. Despite its efficacy, this learning paradigm fails to encompass critical application domains that involve highly sensitive data, such as healthcare and security analytics, where privacy risks limit entities to individually train models using only their own datasets. In this work, we target privacy-preserving collaborative hierarchical clustering. We introduce a formal security definition that aims to achieve the balance between utility and privacy and present a two-party protocol that provably satisfies it. We then extend our protocol with: (i) an optimized version for the single-linkage clustering, and (ii) scalable approximation variants. We implement all our schemes and experimentally evaluate their performance and accuracy on synthetic and real datasets, obtaining very encouraging results. For example, end-to-end execution of our secure approximate protocol for over 1M 10-dimensional data samples requires 35sec of computation and achieves 97.09% accuracy.

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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