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Poster
in
Workshop: Federated Learning and Analytics in Practice: Algorithms, Systems, Applications, and Opportunities

Distributed Mean Estimation for Multi-Message Shuffled Privacy

Antonious Girgis · Suhas Diggavi


Abstract: In this paper, we study distributed mean estimation (DME) under privacy and communication constraints in the multi-message shuffle model. We propose communication-efficient algorithms for privately estimating the mean of bound $\ell_2$-norm and $\ell_{\infty}$-norm norm vectors. Our algorithms are designed by giving unequal privacy at different resolutions of the vector (through binary expansion) and appropriately combining it with co-ordinate sampling. We show that our proposed algorithms achieve order-optimal privacy-communication-performance trade-offs.

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