Local hashing with an optimized output size and a new encrypted oblivious-shuffle protocol improve utility and attack-resistance in shuffler-based differential privacy.
Free Fourier Multipliers associated with the firstSegment
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abstract
We study Fourier multipliers on free group $\mathbb{F}_\infty$ associated with the first segment of the reduced words, and prove that they are completely bounded on the noncommutative $L^p$ spaces $L^p(\hat{\mathbb{F}}_\infty)$ iff their restriction on $L^p(\hat{\mathbb{F}}_1)=L^p(\mathbb{T})$ are completely bounded. As a consequence, every classical Mikhlin multiplier extends to a $L^p$ Fourier multiplier on free groups for all $1<p<\infty$.
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Improving Utility and Security of the Shuffler-based Differential Privacy
Local hashing with an optimized output size and a new encrypted oblivious-shuffle protocol improve utility and attack-resistance in shuffler-based differential privacy.