[2606.26192] Federated Hash Projected Latent Factor Learning
[Submitted on 24 Jun 2026]
Title:Federated Hash Projected Latent Factor Learning
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Abstract:Hash Learning (HL) is an efficient representation learning approach that maps real-valued data into compact binary representations. Traditional HL methods typically require users to upload personal data to a central server, which is incompatible with increasingly stringent data security regulations. Federated Learning (FL) provides a decentralized paradigm for learning globally optimal models without centralizing private data. However, most FL methods rely on transmitting large-scale real-valued gradient information, leading to high communication overhead and potential privacy risks. Integrating HL into FL is a promising solution. Nevertheless, existing HL methods suffer from limited representational capacity of binary codes, which may degrade model accuracy. To address this challenge, we propose a Federated Hash Projected Latent Factor (FHPLF) model. FHPLF introduces three key innovations: (a) replacing real-valued gradient matrices with binary gradient-like matrices, significantly reducing computation, storage, and communication costs while enhancing privacy protection; (b) leveraging Projected Hamming Distance for similarity modeling, which captures the importance of individual binary bits to improve representation capability; and (c) proposing a Secure Binary Gradient Reassembly and Privacy-Enhanced Upload (SBG-PEU) strategy to further reduce the risk of user interaction leakage during transmission. Extensive experiments on four real-world datasets demonstrate that FHPLF consistently outperforms state-of-the-art HL and FL methods, achieving a favorable trade-off among accuracy, efficiency, and privacy preservation.
Subjects:
Machine Learning (cs.LG); Cryptography and Security (cs.CR)
Cite as: arXiv:2606.26192 [cs.LG]
(or arXiv:2606.26192v1 [cs.LG] for this version)
https://doi.org/10.48550/arXiv.2606.26192
arXiv-issued DOI via DataCite (pending registration)
Submission history
From: Jialan He [view email] [v1] Wed, 24 Jun 2026 14:40:09 UTC (82 KB)
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