ASAP: Eliminating algorithm-based disclosure in privacy-preserving data publishing

  • Authors:
  • Xin Jin;Nan Zhang;Gautam Das

  • Affiliations:
  • Department of Computer Science, George Washington University, 20052, United States;Department of Computer Science, George Washington University, 20052, United States;Department of Computer Science and Engineering, University of Texas at Arlington, 76019, United States

  • Venue:
  • Information Systems
  • Year:
  • 2011

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Abstract

Numerous privacy-preserving data publishing algorithms were proposed to achieve privacy guarantees such as @?@?diversity. Many of them, however, were recently found to be vulnerable to algorithm-based disclosure-i.e., privacy leakage incurred by an adversary who is aware of the privacy-preserving algorithm being used. This paper describes generic techniques for correcting the design of existing privacy-preserving data publishing algorithms to eliminate algorithm-based disclosure. We first show that algorithm-based disclosure is more prevalent and serious than previously studied. Then, we strictly define Algorithm-SAfe Publishing (ASAP) to capture and eliminate threats from algorithm-based disclosure. To correct the problems of existing data publishing algorithms, we propose two generic tools to be integrated in their design: global look-ahead and local look-ahead. To enhance data utility, we propose another generic tool called stratified pick-up. We demonstrate the effectiveness of our tools by applying them to several popular @?@?diversity algorithms: Mondrian, Hilb, and MASK. We conduct extensive experiments to demonstrate the effectiveness of our tools in terms of data utility and efficiency.