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- W2912061588 abstract "Privacy concerns with sensitive data in machine learning are receiving increasing attention. In this paper, we study privacy-preserving distributed learning under the framework of Alternating Direction Method of Multipliers (ADMM). While secure distributed learning has been previously exploited in cryptographic or non-cryptographic (noise perturbation) approaches, it comes at a cost of either prohibitive computation overhead or a heavy loss of accuracy. Moreover, convergence in noise perturbation is hardly explored in existing privacy-preserving ADMM schemes. In this work, we propose two modified private ADMM schemes in the scenario of peer-to-peer semi-honest agents: First, for bounded colluding agents, we show that with merely linear secret sharing, information-theoretically private distributed optimization can be achieved. Second, using the notion of differential privacy, we propose first-order approximation based ADMM schemes with random parameters. We prove that the proposed private ADMM schemes can be implemented with a linear convergence rate and with a sharpened privacy loss bound in relation to prior work. Finally, we provide experimental results to support the theory." @default.
- W2912061588 created "2019-02-21" @default.
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- W2912061588 date "2019-02-16" @default.
- W2912061588 modified "2023-10-12" @default.
- W2912061588 title "On Privacy-preserving Decentralized Optimization through Alternating Direction Method of Multipliers." @default.
- W2912061588 hasPublicationYear "2019" @default.
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