Do Cookie Banners Respect my Choice? Measuring Legal Compliance of Banners from IAB Europe's Transparency and Consent Framework

This is the first study that analyses what happens behind the scenes of cookie banners when a user gives consent to tracking. We systematically collect consent stored by cookie banners and measure GDPR and ePrivacy Directive suspected violations on hundreds of websites. As a result, we identified suspected violations on 54% of websites we analysed.

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