20 citations · 63 across the 14 of their papers we have counts for
8 papers · 1 filter
The Adverse Effects of Omitting Records in Differential Privacy: How Sampling and Suppression Degrade the Privacy--Utility Tradeoff (Long Version)
Àlex Miranda-Pascual, Javier Parra-Arnau, Thorsten Strufe
Sampling is renowned for its privacy amplification in differential privacy (DP), and is often assumed to improve the utility of a DP mechanism by allowing a noise reduction. In thi…
Balancing Privacy and Utility in Correlated Data: A Study of Bayesian Differential Privacy
Martin Lange, Patricia Guerra-Balboa, Javier Parra-Arnau +1
Privacy risks in differentially private (DP) systems increase significantly when data is correlated, as standard DP metrics often underestimate the resulting privacy leakage, leavi…
Composition in Differential Privacy for General Granularity Notions (Long Version)
Patricia Guerra-Balboa, Àlex Miranda-Pascual, Javier Parra-Arnau +1
The composition theorems of differential privacy (DP) allow data curators to combine different algorithms to obtain a new algorithm that continues to satisfy DP. However, new granu…
Node Injection Link Stealing Attack
Oualid Zari, Javier Parra-Arnau, Ayşe Ünsal +1
In this paper, we present a stealthy and effective attack that exposes privacy vulnerabilities in Graph Neural Networks (GNNs) by inferring private links within graph-structured da…
Privacy-Protecting Techniques for Behavioral Biometric Data: A Survey
Simon Hanisch, Patricia Arias-Cabarcos, Javier Parra-Arnau +1
Our behavior (the way we talk, walk, act or think) is unique and can be used as a biometric trait. It also correlates with sensitive attributes like emotions and health conditions.…
On the privacy-utility trade-off in differentially private hierarchical text classification
Dominik Wunderlich, Daniel Bernau, Francesco Aldà +2
Hierarchical text classification consists in classifying text documents into a hierarchy of classes and sub-classes. Although artificial neural networks have proved useful to perfo…
Optimized, Direct Sale of Privacy in Personal-Data Marketplaces
Javier Parra-Arnau
Very recently, we are witnessing the emergence of a number of start-ups that enables individuals to sell their private data directly to brokers and businesses. While this new parad…
MyTrackingChoices: Pacifying the Ad-Block War by Enforcing User Privacy Preferences
Jagdish Prasad Achara, Javier Parra-Arnau, Claude Castelluccia
Free content and services on the Web are often supported by ads. However, with the proliferation of intrusive and privacy-invasive ads, a significant proportion of users have start…