PrivTru: a Privacy-by-Design Data Trustee Minimizing Information Leakage

EasyChair Preprint 15937

Abstract

Data trustees serve as intermediaries that facilitate secure data sharing between independent parties. This paper offers a technical perspective on data trustees, guided by privacy-by-design principles. We introduce PrivTru, an instantiation of a data trustee that provably achieves optimal privacy properties. Therefore, PrivTru calculates the minimal amount of information the data trustee needs to request from data sources to respond to a given query. Our analysis shows that PrivTru minimizes information leakage to the data trustee, regardless of the trustee’s prior knowledge,  while preserving the utility of the data.

Keyphrases: Data Trustee, Privacy by Design, privacy engineering

@booklet{EasyChair:15937,
  author    = {Lukas Gehring and Florian Tschorsch},
  title     = {PrivTru: a Privacy-by-Design Data Trustee Minimizing Information Leakage},
  howpublished = {EasyChair Preprint 15937},
  year      = {EasyChair, 2025}}