存储受限数据库的专用读更新写(PRUW)
Private Read Update Write (PRUW) with Storage Constrained Databases
摘要:
我们研究了存储受限数据库中与联邦子模型学习(FSL)相关的私有读更新写(PRUW)问题。在PRUW中,用户私下从包含$M$子模型的$N$数据库系统中读取子模型,在本地更新它,并将更新写回数据库,而不泄露子模型索引或更新的值。在这个问题中考虑的数据库只允许存储由任意存储约束指定的给定量的信息。我们提供了一个存储机制,确定每个数据库的内容之前的应用程序的PRUW计划,使总的通信成本最小化。我们表明,所提出的存储方案实现了较低的总成本相比,通过使用\emph{coded storage}或\emph{divided storage},以满足给定的存储约束。
英文摘要:
We investigate the problem of private read update write (PRUW) in relation to federated submodel learning (FSL) with storage constrained databases. In PRUW, a user privately reads a submodel from a system of $N$ databases containing $M$ submodels, updates it locally, and writes the update back to the databases without revealing the submodel index or the value of the update. The databases considered in this problem are only allowed to store a given amount of information specified by an arbitrary storage constraint. We provide a storage mechanism that determines the contents of each database prior to the application of the PRUW scheme, such that the total communication cost is minimized. We show that the proposed storage scheme achieves a lower total cost compared to what is achieved by using \emph{coded storage} or \emph{divided storage} to meet the given storage constraint.
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