Local Suppression and Splitting Techniques for Privacy Preserving Publication of Trajectories

Local Suppression and Splitting Techniques for Privacy Preserving Publication of Trajectories We study the problem of preserving user privacy in the publication of location sequences. Consider a database of trajectories, corresponding to movements of people, captured by their transactions when they use credit cards, RFID debit cards, or NFC compliant devices. We show that, if such trajectories are published exactly (by only hiding the identities of persons that followed them), one can use partial trajectory knowledge as a quasi-identifier for the remaining locations in the sequence. We devise four intuitive…

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