Paper Accepted at IFIP Sec

We are pleased to share that our work, PrivTru: a Privacy-by-Design Data Trustee Minimizing Information Leakage, has been accepted for publication and presentation at IFIP Sec 2025.

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.