Διασφάλιση ιδιωτικότητας σε βάσεις δεδομένων σημασιολογικά εμπλουτισμένων τροχιών με έλεγχο ερωτημάτων
Privacy preservation for semantically enriched trajectory databases using query auditing techniques
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Σύστημα εντοπισμού θέσηςAbstract
Nowadays, the use of Global Positioning Systems (GPS) has spread so much that they
are embedded in many devices. The ease of collecting and storing data from such kind
of devices along with the advanced processing capabilities, led to the desire of
extracting useful conclusions from them. For example, traffic engineers,
environmentalists etc., by analyzing moving entities recorded data, improve the way
they work and services provided. Yet, the movement traces in space and time of each
recorded entity prove to be a dangerous tool for a malevolent user. Such issues have
been largely addressed by the scientific community. In recent years, we have moved
from the trajectories on semantically enriched trajectories (semantic trajectories) which
provide richer and “deeper” recording / display of a trajectory, leading however to even
greater risk of data handed to a malevolent user.
This study deals with databases containing semantically-enriched trajectories which
remain in-house to the organization that created and maintains them and not with
databases whose an anonymous version of the original dataset has been published.
Thus, based on relevant approaches regarding “plain” trajectories and quite inspired by
earlier work on statistical databases, we, primarily, define our working framework.
Subsequently, we identify all potential privacy breaches and recommend a
comprehensive query auditing mechanism in order to address these breaches. Finally, as
a distinct component of this mechanism, we propose a standalone algorithm (Zoom
Out), which helps to improve the user friendliness and functionality of the above
mechanism. Its objective is to modify the initial query posed by the user, if it cannot be
answered at first for “safety” reasons, to the “nearest” query that can be possibly
answered with “safety”.
Postgraduate Studies Programme
Προηγμένα Συστήματα ΠληροφορικήςDepartment
Σχολή Τεχνολογιών Πληροφορικής και Επικοινωνιών. Τμήμα ΠληροφορικήςNumber of pages
106Language
GreekCollections
Except where otherwise noted, this item's license is described as
Attribution-NonCommercial-NoDerivatives 4.0 Διεθνές
Attribution-NonCommercial-NoDerivatives 4.0 Διεθνές