Search Results for author: Martine De Cock

Found 23 papers, 2 papers with code

Privacy-Preserving Fair Item Ranking

no code implementations6 Mar 2023 Jia Ao Sun, Sikha Pentyala, Martine De Cock, Golnoosh Farnadi

Users worldwide access massive amounts of curated data in the form of rankings on a daily basis.

Fairness Privacy Preserving

Secure Multiparty Computation for Synthetic Data Generation from Distributed Data

no code implementations13 Oct 2022 Mayana Pereira, Sikha Pentyala, Anderson Nascimento, Rafael T. de Sousa Jr., Martine De Cock

Legal and ethical restrictions on accessing relevant data inhibit data science research in critical domains such as health, finance, and education.

Synthetic Data Generation

PrivFairFL: Privacy-Preserving Group Fairness in Federated Learning

no code implementations23 May 2022 Sikha Pentyala, Nicola Neophytou, Anderson Nascimento, Martine De Cock, Golnoosh Farnadi

Group fairness ensures that the outcome of machine learning (ML) based decision making systems are not biased towards a certain group of people defined by a sensitive attribute such as gender or ethnicity.

Attribute Decision Making +3

PrivFair: a Library for Privacy-Preserving Fairness Auditing

1 code implementation8 Feb 2022 Sikha Pentyala, David Melanson, Martine De Cock, Golnoosh Farnadi

Machine learning (ML) has become prominent in applications that directly affect people's quality of life, including in healthcare, justice, and finance.

Fairness Privacy Preserving

Training Differentially Private Models with Secure Multiparty Computation

no code implementations5 Feb 2022 Sikha Pentyala, Davis Railsback, Ricardo Maia, Rafael Dowsley, David Melanson, Anderson Nascimento, Martine De Cock

We address the problem of learning a machine learning model from training data that originates at multiple data owners while providing formal privacy guarantees regarding the protection of each owner's data.

Privacy Preserving

Privacy-Preserving Training of Tree Ensembles over Continuous Data

no code implementations5 Jun 2021 Samuel Adams, Chaitali Choudhary, Martine De Cock, Rafael Dowsley, David Melanson, Anderson C. A. Nascimento, Davis Railsback, Jianwei Shen

In this paper we propose three more efficient alternatives for secure training of decision tree based models on data with continuous features, namely: (1) secure discretization of the data, followed by secure training of a decision tree over the discretized data; (2) secure discretization of the data, followed by secure training of a random forest over the discretized data; and (3) secure training of extremely randomized trees (``extra-trees'') on the original data.

Privacy Preserving

Privacy-Preserving Feature Selection with Secure Multiparty Computation

no code implementations6 Feb 2021 Xiling Li, Rafael Dowsley, Martine De Cock

In this work, we propose the first MPC based protocol for private feature selection based on the filter method, which is independent of model training, and can be used in combination with any MPC protocol to rank features.

BIG-bench Machine Learning feature selection +1

Privacy-Preserving Video Classification with Convolutional Neural Networks

no code implementations6 Feb 2021 Sikha Pentyala, Rafael Dowsley, Martine De Cock

We propose a privacy-preserving implementation of single-frame method based video classification with convolutional neural networks that allows a party to infer a label from a video without necessitating the video owner to disclose their video to other entities in an unencrypted manner.

Classification Emotion Recognition +4

Private Speech Classification with Secure Multiparty Computation

no code implementations1 Jul 2020 Kyle Bittner, Martine De Cock, Rafael Dowsley

We evaluate the efficiency-security-accuracy trade-off of the proposed solution in a use case for privacy-preserving emotion detection from speech with a convolutional neural network.

Audio Classification Audio Signal Processing +3

Inline Detection of DGA Domains Using Side Information

no code implementations12 Mar 2020 Raaghavi Sivaguru, Jonathan Peck, Femi Olumofin, Anderson Nascimento, Martine De Cock

We found that the DGA classifiers that rely on both the domain name and side information have high performance and are more robust against adversaries.

Adversarial Attack

High Performance Logistic Regression for Privacy-Preserving Genome Analysis

1 code implementation13 Feb 2020 Martine De Cock, Rafael Dowsley, Anderson C. A. Nascimento, Davis Railsback, Jianwei Shen, Ariel Todoki

In this paper, we present a secure logistic regression training protocol and its implementation, with a new subprotocol to securely compute the activation function.

Privacy Preserving regression +1

User Profiling Using Hinge-loss Markov Random Fields

no code implementations5 Jan 2020 Golnoosh Farnadi, Lise Getoor, Marie-Francine Moens, Martine De Cock

In this paper, we propose a mechanism to infer a variety of user characteristics, such as, age, gender and personality traits, which can then be compiled into a user profile.

Relational Reasoning

CharBot: A Simple and Effective Method for Evading DGA Classifiers

no code implementations3 May 2019 Jonathan Peck, Claire Nie, Raaghavi Sivaguru, Charles Grumer, Femi Olumofin, Bin Yu, Anderson Nascimento, Martine De Cock

In this work, we present a novel DGA called CharBot which is capable of producing large numbers of unregistered domain names that are not detected by state-of-the-art classifiers for real-time detection of DGAs, including the recently published methods FANCI (a random forest based on human-engineered features) and LSTM. MI (a deep learning approach).

Adversarial Attack

VirtualIdentity: Privacy-Preserving User Profiling

no code implementations30 Aug 2018 Sisi Wang, Wing-Sea Poon, Golnoosh Farnadi, Caleb Horst, Kebra Thompson, Michael Nickels, Rafael Dowsley, Anderson C. A. Nascimento, Martine De Cock

User profiling from user generated content (UGC) is a common practice that supports the business models of many social media companies.

Privacy Preserving

Character Level Based Detection of DGA Domain Names

no code implementations ICLR 2018 Bin Yu, Jie Pan, Jiaming Hu, Anderson Nascimento, Martine De Cock

Recently several different deep learning architectures have been proposed that take a string of characters as the raw input signal and automatically derive features for text classification.

General Classification text-classification +1

Solving stable matching problems using answer set programming

no code implementations16 Dec 2015 Sofie De Clercq, Steven Schockaert, Martine De Cock, Ann Nowé

Since the introduction of the stable marriage problem (SMP) by Gale and Shapley (1962), several variants and extensions have been investigated.

Characterizing and Extending Answer Set Semantics using Possibility Theory

no code implementations30 Nov 2013 Kim Bauters, Steven Schockaert, Martine De Cock, Dirk Vermeir

In particular, while the complexity of most reasoning tasks coincides with standard disjunctive ASP, we find that brave reasoning for programs with weak disjunctions is easier.

Modeling Stable Matching Problems with Answer Set Programming

no code implementations28 Feb 2013 Sofie De Clercq, Steven Schockaert, Martine De Cock, Ann Nowé

Our encoding can easily be extended and adapted to the needs of specific applications.

Discovering Missing Wikipedia Inter-language Links by means of Cross-lingual Word Sense Disambiguation

no code implementations LREC 2012 Els Lefever, V{\'e}ronique Hoste, Martine De Cock

The input for the inter-language link detection system is a set of Dutch pages for a given ambiguous noun and the output of the system is a set of links to the corresponding pages in three target languages (viz.

Text Summarization Word Sense Disambiguation

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