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Measuring the Impact of the GDPR on Data Sharing in Ad Networks

  • The European General Data Protection Regulation (GDPR), which went into effect in May 2018, brought new rules for the processing of personal data that affect many business models, including online advertising. The regulation’s definition of personal data applies to every company that collects data from European Internet users. This includes tracking services that, until then, argued that they were collecting anonymous information and data protection requirements would not apply to their businesses. Previous studies have analyzed the impact of the GDPR on the prevalence of online tracking, with mixed results. In this paper, we go beyond the analysis of the number of third parties and focus on the underlying information sharing networks between online advertising companies in terms of client-side cookie syncing. Using graph analysis, our measurement shows that the number of ID syncing connections decreased by around 40 % around the time the GDPR went into effect, but a long-term analysis shows a slight rebound since then. While we can show a decrease in information sharing between third parties, which is likely related to the legislation, the data also shows that the amount of tracking, as well as the general structure of cooperation, was not affected. Consolidation in the ecosystem led to a more centralized infrastructure that might actually have negative effects on user privacy, as fewer companies perform tracking on more sites.

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Metadaten
Verfasserangaben:Tobias Urban, Dennis Tatang, Martin Degeling, Thorsten Holz, Norbert Pohlmann
DOI:https://doi.org/10.1145/3320269.3372194
Titel des übergeordneten Werkes (Deutsch):ACM Asia CCS 2020, Taipei, Taiwan 2020
Dokumentart:Wissenschaftlicher Artikel
Sprache:Englisch
Jahr der Fertigstellung:2020
Jahr der Erstveröffentlichung:2020
Veröffentlichende Institution:Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen
Datum der Freischaltung:26.02.2024
Jahrgang:2020
Erste Seite:222
Letzte Seite:235
Lizenz (Deutsch):License LogoEs gilt das Urheberrechtsgesetz

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