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Microdata and k-anonymity: a quantitative approach in the Spanish context

  • This paper offers a quantitative perspective to the debate between privacy and transparency concerning the dissemination of datasets containing potentially sensitive personal information. It applies in the Spanish context methods, some of which had previously been used in the USA, to estimate the number of people who can be identified in anonymized microdata files containing their sex, birth date, and place of residence. The estimations in this paper indicate that 42% of Spanish citizens could be reidentifiable if only these basic demographic characteristics were known.
  • Keywords: Privacy, Anonymity, Public Data.
  • AMS Subject classifications: 62A01, 62-07.