Automatic Construction of Generalization Hierarchies for Publishing Anonymized Data

  • Vanessa Ayala-Rivera
  • Liam Murphy
  • Christina Thorpe
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9983)

Abstract

Concept hierarchies are widely used in multiple fields to carry out data analysis. In data privacy, they are known as Value Generalization Hierarchies (VGHs), and are used by generalization algorithms to dictate the data anonymization. Thus, their proper specification is critical to obtain anonymized data of good quality. The creation and evaluation of VGHs require expert knowledge and a significant amount of manual effort, making these tasks highly error-prone and time-consuming. In this paper we present AIKA, a knowledge-based framework to automatically construct and evaluate VGHs for the anonymization of categorical data. AIKA integrates ontologies to objectively create and evaluate VGHs. It also implements a multi-dimensional reward function to tailor the VGH evaluation to different use cases. Our experiments show that AIKA improved the creation of VGHs by generating VGHs of good quality in less time than when manually done. Results also showed how the reward function properly captures the desired VGH properties.

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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  • Vanessa Ayala-Rivera
    • 1
  • Liam Murphy
    • 1
  • Christina Thorpe
    • 1
  1. 1.Lero@UCD, School of Computer ScienceUniversity College DublinDublinIreland

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