To access the full text documents, please follow this link: http://hdl.handle.net/2117/12909

Attribute selection in multivariate microaggregation
Nin Guerrero, Jordi; Herranz Sotoca, Javier; Torra i Reventós, Vicenç
Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada IV; Universitat Politècnica de Catalunya. MAK - Matemàtica Aplicada a la Criptografia
Microaggregation is one of the most employed microdata protection methods. The idea is to build clusters of at least k original records, and then replace them with the centroid of the cluster. When the number of attributes of the dataset is large, a common practice is to split the dataset into smaller blocks of attributes. Microaggregation is successively and independently applied to each block. In this way, the effect of the noise introduced by microaggregation is reduced, but at the cost of losing the k-anonymity property. The goal of this work is to show that, besides of the specific microaggregation method employed, the value of the parameter k, and the number of blocks in which the dataset is split, there exists another factor which can influence the quality of the microaggregation: the way in which the attributes are grouped to form the blocks. When correlated attributes are grouped in the same block, the statistical utility of the protected dataset is higher. In contrast, when correlated attributes are dispersed into different blocks, the achieved anonymity is higher, and, so, the disclosure risk is lower. We present quantitative evaluations of such statements based on different experiments on real datasets.
Àrees temàtiques de la UPC::Informàtica::Seguretat informàtica
Data protection
Attribute selection
Microaggregation
Statistical disclosure control
Protecció de dades
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
         

Show full item record

Related documents

Other documents of the same author

Herranz Sotoca, Javier; Matwin, Stan; Nin Guerrero, Jordi; Torra i Reventós, Vicenç
Nin Guerrero, Jordi; Herranz Sotoca, Javier; Torra i Reventós, Vicenç
Herranz Sotoca, Javier; Nin Guerrero, Jordi; Torra i Reventós, Vicenç
Nin Guerrero, Jordi; Herranz Sotoca, Javier; Torra i Reventós, Vicenç
Nin Guerrero, Jordi; Herranz Sotoca, Javier; Torra i Reventós, Vicenç
 

Coordination

 

Supporters