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arXiv 2311.03488cs.IRcs.AIcs.CRcs.LG
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面向隐私敏感推荐系统的多分辨率扩散方法

Multi-Resolution Diffusion for Privacy-Sensitive Recommender Systems

San Jose State University(圣何塞州立大学)

Derek Lilienthal, Paul Mello, Magdalini Eirinaki, Stas Tiomkin

AI总结:

针对推荐系统依赖用户数据引发的隐私问题,提出基于分数的扩散推荐模块SDRM,可生成或增强合成数据保护隐私,其性能优于多种基线模型。

摘要:

尽管推荐系统已成为网络体验不可或缺的组成部分,但其对用户数据的高度依赖引发了隐私与安全担忧。用合成数据替代用户数据可解决这些问题,但精准复现这类真实数据集一直是公认的难题。生成式AI的最新进展已证明,扩散模型在跨多个领域生成真实数据方面具备出色能力。本研究提出了基于分数的扩散推荐模块(Score-based Diffusion Recommendation Module, SDRM),该模块能够捕捉真实数据集的复杂模式,而这些模式是训练高精度推荐系统所必需的。SDRM可生成合成数据,用于替代现有数据集以保护用户隐私,或增强现有数据集以解决数据过度稀疏问题。在合成各类数据集以替代或增强原始数据的任务中,我们的方法优于生成对抗网络、变分自编码器以及近期提出的扩散模型等对比基线,在Recall@k上平均提升4.30%,在NDCG@k上平均提升4.65%。

英文摘要:

While recommender systems have become an integral component of the Web experience, their heavy reliance on user data raises privacy and security concerns. Substituting user data with synthetic data can address these concerns, but accurately replicating these real-world datasets has been a notoriously challenging problem. Recent advancements in generative AI have demonstrated the impressive capabilities of diffusion models in generating realistic data across various domains. In this work we introduce a Score-based Diffusion Recommendation Module (SDRM), which captures the intricate patterns of real-world datasets required for training highly accurate recommender systems. SDRM allows for the generation of synthetic data that can replace existing datasets to preserve user privacy, or augment existing datasets to address excessive data sparsity. Our method outperforms competing baselines such as generative adversarial networks, variational autoencoders, and recently proposed diffusion models in synthesizing various datasets to replace or augment the original data by an average improvement of 4.30% in Recall@k and 4.65% in NDCG@k.

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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