Invariant post-tabular protection of census frequency counts

Natalie Shlomo, Caroline Young

Research output: Chapter in Book/Report/Conference proceedingChapter


Some countries use forms of random rounding as a post-tabular method to protect Census frequency counts disseminated in tables. These methods typically result in inconsistencies between aggregated internal cells to marginal totals and across same cells in different tables. A post-tabular method for perturbing frequency counts is proposed which preserves totals and corrects to a large extent inconsistencies. The perturbation is based on invariant probability transition matrices and the use of microdata keys. This method will be compared to common pre and post-tabular methods for protecting Census frequency counts. © 2008 Springer-Verlag Berlin Heidelberg.
Original languageEnglish
Title of host publicationLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)|Lect. Notes Comput. Sci.
Subtitle of host publicationEds. J. Domingo-Ferrer and Y. Saygin
Place of PublicationGermany
PublisherSpringer Nature
Number of pages12
Publication statusPublished - 2008
EventInternational Conference on Privacy in Statistical Databases, PSD 2008 - Istanbul
Duration: 1 Jul 2008 → …


OtherInternational Conference on Privacy in Statistical Databases, PSD 2008
Period1/07/08 → …


  • Additivity
  • Consistency
  • Invariantprobability transition matrix
  • Microdata keys


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