arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.07253cs.LGcs.CR
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数据稀疏性在安全跨平台社交推荐中的应用

Exploiting Data Sparsity in Secure Cross-Platform Social Recommendation

Ant Group(蚂蚁集团);Zhejiang University(浙江大学);Sony AI(索尼人工智能);Emory University(埃默里大学)

Jamie Cui, Chaochao Chen, Lingjuan Lyu, Carl Yang, Li Wang

摘要:

社会推荐已经显示出比传统系统有希望的改进,因为它利用社会相关数据作为额外的输入。大多数现有的工作假设所有数据都可用于推荐平台。然而,在实践中,用户-项目交互数据(例如,评级)和用户-用户社交数据通常由不同的平台生成,并且两者都包含敏感信息。因此,“如何在数据高度稀疏的不同平台上执行安全有效的社交推荐”仍然是一个重要的挑战。在这项工作中,我们将安全计算技术引入社交推荐,并提出S3 Rec,一个稀疏感知的安全跨平台的社交推荐框架。结果表明,该模型不仅可以通过整合社交平台上的稀疏社交数据来提高评级平台的推荐性能,而且可以保护两个平台的数据隐私。此外,为了进一步提高模型训练效率,我们提出了两种基于同态加密和私有信息检索的安全稀疏矩阵乘法协议。我们在两个基准数据集上的实验证明了S3 Rec的有效性。

英文摘要:

Social recommendation has shown promising improvements over traditional systems since it leverages social correlation data as an additional input. Most existing work assumes that all data are available to the recommendation platform. However, in practice, user-item interaction data (e.g.,rating) and user-user social data are usually generated by different platforms, and both of which contain sensitive information. Therefore, "How to perform secure and efficient social recommendation across different platforms, where the data are highly-sparse in nature" remains an important challenge. In this work, we bring secure computation techniques into social recommendation, and propose S3Rec, a sparsity-aware secure cross-platform social recommendation framework. As a result, our model can not only improve the recommendation performance of the rating platform by incorporating the sparse social data on the social platform, but also protect data privacy of both platforms. Moreover, to further improve model training efficiency, we propose two secure sparse matrix multiplication protocols based on homomorphic encryption and private information retrieval. Our experiments on two benchmark datasets demonstrate the effectiveness of S3Rec.

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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