Resumen de Comment on “Unique in the shopping mall: On the reidentifiability of credit card metadata”
David Sánchez, Sergio Martínez, Josep Domingo i Ferrer 
De Montjoye et al. (Reports, 30 January 2015, p. 536) claimed that most individuals can be reidentified from a deidentified transaction database and that anonymization mechanisms are not effective against reidentification. We demonstrate that anonymization can be performed by techniques well established in the literature.
