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Rethinking rank swapping to decrease disclosure risk

AuthorsNin, Jordi ; Herranz, Javier ; Torra, Vicenç
KeywordsRecord linkage
Privacy in statistical databases
Rank swapping
Statistical disclosure risk
Issue Date2008
CitationData and Knowledge Engineering 64: 346- 364 (2008)
AbstractNowadays, the need for privacy motivates the use of methods that allow to protect a microdata file both minimizing the disclosure risk and preserving the data utility. A very popular microdata protection method is rank swapping. Record linkage is the standard mechanism used to measure the disclosure risk of a microdata protection method. In this paper we present a new record linkage method, specific for rank swapping, which obtains more links than standard ones. The consequence is that rank swapping has a higher disclosure risk than believed up to now. Motivated by this, we present two new variants of the rank swapping method, which make the new record linkage technique unsuitable. Therefore, the real disclosure risk of these new methods is lower than the standard rank swapping. © 2007 Elsevier B.V. All rights reserved.
Identifiersdoi: 10.1016/j.datak.2007.07.006
issn: 0169-023X
Appears in Collections:(IIIA) Artículos
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