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- W4300686733 abstract "We develop a privatised stochastic variational inference method for Latent Dirichlet Allocation (LDA). The iterative nature of stochastic variational inference presents challenges: multiple iterations are required to obtain accurate posterior distributions, yet each iteration increases the amount of noise that must be added to achieve a reasonable degree of privacy. We propose a practical algorithm that overcomes this challenge by combining: (1) an improved composition method for differential privacy, called the moments accountant, which provides a tight bound on the privacy cost of multiple variational inference iterations and thus significantly decreases the amount of additive noise; and (2) privacy amplification resulting from subsampling of large-scale data. Focusing on conjugate exponential family models, in our private variational inference, all the posterior distributions will be privatised by simply perturbing expected sufficient statistics. Using Wikipedia data, we illustrate the effectiveness of our algorithm for large-scale data." @default.
- W4300686733 created "2022-10-04" @default.
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- W4300686733 date "2016-09-13" @default.
- W4300686733 modified "2023-09-27" @default.
- W4300686733 title "Private Topic Modeling" @default.
- W4300686733 doi "https://doi.org/10.48550/arxiv.1609.04120" @default.
- W4300686733 hasPublicationYear "2016" @default.
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