Search Results for author: Natasha Fernandes

Found 4 papers, 0 papers with code

Directional Privacy for Deep Learning

no code implementations9 Nov 2022 Pedro Faustini, Natasha Fernandes, Shakila Tonni, Annabelle McIver, Mark Dras

In this paper, we apply \textit{directional privacy}, via a mechanism based on the von Mises-Fisher (VMF) distribution, to perturb gradients in terms of \textit{angular distance} so that gradient direction is broadly preserved.

Locality Sensitive Hashing with Extended Differential Privacy

no code implementations19 Oct 2020 Natasha Fernandes, Yusuke Kawamoto, Takao Murakami

Then we show that our mechanisms enable friend matching with high utility and rigorous privacy guarantees based on extended DP.

Generalised Differential Privacy for Text Document Processing

no code implementations26 Nov 2018 Natasha Fernandes, Mark Dras, Annabelle McIver

We address the problem of how to "obfuscate" texts by removing stylistic clues which can identify authorship, whilst preserving (as much as possible) the content of the text.

Authorship Attribution BIG-bench Machine Learning +3

Author Obfuscation Using Generalised Differential Privacy

no code implementations22 May 2018 Natasha Fernandes, Mark Dras, Annabelle McIver

The problem of obfuscating the authorship of a text document has received little attention in the literature to date.

Cryptography and Security

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