Search Results for author: Amos Beimel

Found 8 papers, 0 papers with code

On the Round Complexity of the Shuffle Model

no code implementations28 Sep 2020 Amos Beimel, Iftach Haitner, Kobbi Nissim, Uri Stemmer

Combining this primitive with the two-round semi-honest protocol of Applebaun et al. [TCC 2018], we obtain that every randomized functionality can be computed in the shuffle model with an honest majority, in merely two rounds.

Closure Properties for Private Classification and Online Prediction

no code implementations10 Mar 2020 Noga Alon, Amos Beimel, Shay Moran, Uri Stemmer

Let~$\cH$ be a class of boolean functions and consider a {\it composed class} $\cH'$ that is derived from~$\cH$ using some arbitrary aggregation rule (for example, $\cH'$ may be the class of all 3-wise majority-votes of functions in $\cH$).

Classification General Classification +1

The power of synergy in differential privacy: Combining a small curator with local randomizers

no code implementations18 Dec 2019 Amos Beimel, Aleksandra Korolova, Kobbi Nissim, Or Sheffet, Uri Stemmer

Motivated by the desire to bridge the utility gap between local and trusted curator models of differential privacy for practical applications, we initiate the theoretical study of a hybrid model introduced by "Blender" [Avent et al.,\ USENIX Security '17], in which differentially private protocols of n agents that work in the local-model are assisted by a differentially private curator that has access to the data of m additional users.

Two-sample testing

Private Center Points and Learning of Halfspaces

no code implementations27 Feb 2019 Amos Beimel, Shay Moran, Kobbi Nissim, Uri Stemmer

The building block for this learner is a differentially private algorithm for locating an approximate center point of $m>\mathrm{poly}(d, 2^{\log^*|X|})$ points -- a high dimensional generalization of the median function.

Privacy Preserving Multi-Agent Planning with Provable Guarantees

no code implementations31 Oct 2018 Amos Beimel, Ronen I. Brafman

In privacy-preserving multi-agent planning, a group of agents attempt to cooperatively solve a multi-agent planning problem while maintaining private their data and actions.

Privacy Preserving

Private Learning and Sanitization: Pure vs. Approximate Differential Privacy

no code implementations10 Jul 2014 Amos Beimel, Kobbi Nissim, Uri Stemmer

We show that the sample complexity of these tasks under approximate differential privacy can be significantly lower than that under pure differential privacy.

Learning Privately with Labeled and Unlabeled Examples

no code implementations10 Jul 2014 Amos Beimel, Kobbi Nissim, Uri Stemmer

In 2008, Kasiviswanathan et al. (FOCS 2008) gave a generic construction of private learners, in which the sample complexity is (generally) higher than what is needed for non-private learners.

Active Learning

Characterizing the Sample Complexity of Private Learners

no code implementations10 Feb 2014 Amos Beimel, Kobbi Nissim, Uri Stemmer

Kasiviswanathan et al. gave a generic construction of private learners for (finite) concept classes, with sample complexity logarithmic in the size of the concept class.

PAC learning

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