Post-graduate theses
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Identifier |
000445884 |
Title |
Tracking mechanisms and the effect of user consent on the web |
Alternative Title |
Μηχανισμοί ιχνηλάτησης και η επίδραση της συναίνεσης του χρήστη στο διαδίκτυο |
Author
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Παπαδογιαννάκης, Εμμανουήλ Α.
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Thesis advisor
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Μαρκάτος, Ευάγγελος
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Reviewer
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Πλεξουσάκης, Δημήτρης
Κουρτέλλης, Νικόλαος
Παπαδόπουλος, Παναγιώτης
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Abstract |
During the past few years, mostly as a result of legislation such as the GDPR and the
CCPA, websites have started presenting users with consent banners. These banners
are web forms where users can state their preference regarding data processing
purposes and declare which cookies they would like to accept. Although requesting
consent before storing any identifiable information is a good start towards respecting
the user privacy, previous research has shown that websites do not always respect
user choices. Furthermore, considering not only the ever decreasing reliance of
trackers on cookies, but also the actions browser vendors take by blocking or
restricting third-party cookies, we anticipate a world where stateless tracking
emerges, either because trackers or websites do not use cookies, or because users
simply refuse to accept any.
In this thesis, we explore whether websites use more persistent and sophisticated
forms of tracking in order to track users who explicitly denied consent. Such forms of
tracking include first-party ID leaking, third-party ID synchronization and browser
fingerprinting. Using a novel web crawler, we examined the consent banners of over
27,000 websites and our results suggest that websites do use such modern forms of
tracking even before users had the opportunity to register their consent choice. To
add insult to injury, when users choose to raise their voice, deny consent and reject
all cookies, user tracking only intensifies. We measured that aggressive tracking takes
place before users had the opportunity to make a selection in the consent banner,
with more than 75% of tracking activities happening when users chose to deny
consent. Consequently, we conclude that user choices play very little role with respect
to sophisticated tracking mechanisms.
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Language |
English |
Subject |
GDPR |
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User consent |
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User tracking |
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Web fingerprinting |
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Αποτυπώματα διαδικτύου |
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Ιχνηλάτηση χρηστών |
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Συναίνεση χρήστη |
Issue date |
2022-03-18 |
Collection
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School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
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Type of Work--Post-graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/3/4/f/metadata-dlib-1644662953-610588-30411.tkl
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Views |
454 |