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InfoResearchPeer-reviewed
Analysis of Collaborative Data Privacy Leakage: A Macro-Level Perspective
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Summary
This paper presents the first rigorous quantitative analysis of macro-level collaborative leakage, where individually harmless risk data reveal sensitive information when combined. The authors attribute the phenomenon to collaborative effects among pieces of risk data and formulate a sufficient condition for it. They show that Gaussian-distributed data can align correlations at both micro and macro levels, which helps prevent the leakage, but that this protection is inherently limited.