title: Privacy preserving data publishing of categorical data through k-anonymity and feature selection.
abstract: In healthcare, there is a vast amount of patients' data, which can lead to important discoveries if combined. Due to legal and ethical issues, such data cannot be shared and hence such information is underused. A new area of research has emerged, called privacy preserving data publishing (PPDP), which aims in sharing data in a way that privacy is preserved while the information lost is kept at a minimum. In this Letter, a new anonymisation algorithm for PPDP is proposed, which is based on k-anonymity through pattern-based multidimensional suppression (kPB-MS). The algorithm uses feature selection for reducing the data dimensionality and then combines attribute and record suppression for obtaining k-anonymity. Five datasets from different areas of life sciences [RETINOPATHY, Single Proton Emission Computed Tomography imaging, gene sequencing and drug discovery (two datasets)], were anonymised with kPB-MS. The produced anonymised datasets were evaluated using four different classifiers and in 74% of the test cases, they produced similar or better accuracies than using the full datasets.
authors.affiliation: Department of Computer Science , University of Cyprus , Nicosia , Cyprus.
authors.forename: Aristos
authors.initials: A
authors.lastname: Aristodimou
authors.affiliation: Department of Computer Science , University of Cyprus , Nicosia , Cyprus.
authors.forename: Athos
authors.initials: A
authors.lastname: Antoniades
authors.affiliation: Department of Computer Science , University of Cyprus , Nicosia , Cyprus.
authors.forename: Constantinos S
authors.initials: CS
authors.lastname: Pattichis
keywords: RETINOPATHY; SPECT imaging; anonymisation algorithm; categorical data; classifier; data dimensionality; data privacy; data sharing; drug discovery; drugs; feature selection; gene sequencing; k-anonymity through pattern-based multidimensional suppression; medical computing; privacy preserving data publishing; single photon emission computed tomography; single proton emission computed tomography