Synthetic Data Generation of Many-to-Many Datasets via Random Graph GenerationDownload PDF

Published: 01 Feb 2023, 19:22, Last Modified: 01 Mar 2023, 05:04ICLR 2023 posterReaders: Everyone
Keywords: synthetic data generation, random graph generation, differential privacy
TL;DR: We synthesise datasets with many-to-many relationships by first generating the relationships via random graph generation and then generating the data attributes.
Abstract: Synthetic data generation (SDG) has become a popular approach to release private datasets. In SDG, a generative model is fitted on the private real data, and samples drawn from the model are released as the protected synthetic data. While real-world datasets usually consist of multiple tables with potential \emph{many-to-many} relationships (i.e.~\emph{many-to-many datasets}), recent research in SDG mostly focuses on modeling tables \emph{independently} or only considers generating datasets with special cases of many-to-many relationships such as \emph{one-to-many}. In this paper, we first study challenges of building faithful generative models for many-to-many datasets, identifying limitations of existing methods. We then present a novel factorization for many-to-many generative models, which leads to a scalable generation framework by combining recent results from random graph theory and representation learning. Finally, we extend the framework to establish the notion of $(\epsilon,\delta)$-differential privacy. Through a real-world dataset, we demonstrate that our method can generate synthetic datasets while preserving information within and across tables better than its closest competitor.
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