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Related papers: Opted Out, Yet Tracked: Are Regulations Enough to …

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The California Consumer Privacy Act (CCPA) secures the right to Opt-Out for consumers in California. However, websites may implement complex consent mechanisms that potentially do not capture the user's true choices. We investigated the…

Cryptography and Security · Computer Science 2023-09-06 Torsha Mazumdar , Daniel Timko , Muhammad Lutfor Rahman

The widespread sharing of consumers personal information with third parties raises significant privacy concerns. The California Consumer Privacy Act (CCPA) mandates that online businesses offer consumers the option to opt out of the sale…

Human-Computer Interaction · Computer Science 2024-03-28 Van Tran , Aarushi Mehrotra , Marshini Chetty , Nick Feamster , Jens Frankenreiter , Lior Strahilevitz

In response to growing concerns about user privacy, legislators have introduced new regulations and laws such as the General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA) that force websites to obtain user…

Computers and Society · Computer Science 2024-03-01 Nikhil Jha , Martino Trevisan , Marco Mellia , Daniel Fernandez , Rodrigo Irarrazaval

Many mobile apps' business model is based on sharing user data with ad networks to deliver personalized ads. The California Consumer Privacy Act (CCPA) gives California residents a right to opt out. In two experiments we evaluate to which…

Cryptography and Security · Computer Science 2025-12-18 Sebastian Zimmeck , Nishant Aggarwal , Zachary Liu , Sage Altman , Konrad Kollnig

Consent Management Providers (CMPs) provide consent pop-ups that are embedded in ever more websites over time to enable streamlined compliance with the legal requirements for consent mandated by the ePrivacy Directive and the General Data…

Human-Computer Interaction · Computer Science 2021-04-15 Cristiana Santos , Midas Nouwens , Michael Toth , Nataliia Bielova , Vincent Roca

During the past few years, mostly as a result of the GDPR and the CCPA, websites have started to present users with cookie consent banners. These banners are web forms where the users can state their preference and declare which cookies…

Computers and Society · Computer Science 2022-02-11 Emmanouil Papadogiannakis , Panagiotis Papadopoulos , Nicolas Kourtellis , Evangelos P. Markatos

Data brokers collect and sell the personal information of millions of individuals, often without their knowledge or consent. The California Consumer Privacy Act (CCPA) grants consumers the legal right to request access to, or deletion of,…

Cryptography and Security · Computer Science 2025-11-17 Elina van Kempen , Isita Bagayatkar , Pavel Frolikov , Chloe Georgiou , Gene Tsudik

Online tracking remains problematic, with compliance and ethical issues persisting despite regulatory efforts. Consent interfaces, the visible manifestation of this industry, have seen significant attention over the years. We present robust…

Computers and Society · Computer Science 2025-03-26 Midas Nouwens , Janus Bager Kristensen , Kristjan Maalt , Rolf Bagge

To protect consumer privacy, the California Consumer Privacy Act (CCPA) mandates that businesses provide consumers with a straightforward way to opt out of the sale and sharing of their personal information. However, the control that…

Human-Computer Interaction · Computer Science 2024-09-17 Van Hong Tran , Aarushi Mehrotra , Ranya Sharma , Marshini Chetty , Nick Feamster , Jens Frankenreiter , Lior Strahilevitz

The California Consumer Privacy Act (CCPA) -- which began enforcement on July 1, 2020 -- grants California users the affirmative right to opt-out of the sale of their personal information. In this work, we perform a series of observational…

Cryptography and Security · Computer Science 2021-07-15 Sean O'Connor , Ryan Nurwono , Aden Siebel , Eleanor Birrell

New consent management platforms (CMPs) have been introduced to the web to conform with the EU's General Data Protection Regulation, particularly its requirements for consent when companies collect and process users' personal data. This…

Human-Computer Interaction · Computer Science 2020-01-09 Midas Nouwens , Ilaria Liccardi , Michael Veale , David Karger , Lalana Kagal

Despite stringent data protection regulations such as the General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA), and other country-specific regulations, many websites continue to use cookies to track user…

Computers and Society · Computer Science 2024-01-12 Nivedita Singh , Yejin Do , Yongsang Yu. Imane Fouad , Jungrae Kim , Hyoungshick Kim

Recent privacy regulations such as the General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA) have established legal requirements for obtaining user consent regarding the collection, use, and sharing of…

Cryptography and Security · Computer Science 2025-12-30 Ying Li , Wenjun Qiu , Faysal Hossain Shezan , Kunlin Cai , Michelangelo van Dam , Lisa Austin , David Lie , Yuan Tian

To comply with data protection regulations such as the EU General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA), websites widely deploy cookie consent banners to collect users' privacy preferences. In…

Cryptography and Security · Computer Science 2026-03-24 Nivedita Singh , Seyoung Jin , Hyoungshick Kim

The California Consumer Protection Act (CCPA) gives users the right to opt-out of sale of their personal information, but prior work has found that opt-out mechanisms provided under this law result in very low opt-out rates. Privacy signals…

Computers and Society · Computer Science 2022-09-29 Aden Siebel , Eleanor Birrell

On January 1, 2020, California passed the California Consumer Privacy Act (CCPA) by more than 56% of voters intended to enhance privacy rights and consumer protection for residents of California, United States. Since then, more conditions…

Computers and Society · Computer Science 2022-09-13 Trong Nguyen

Vagueness and ambiguity in privacy policies threaten the ability of consumers to make informed choices about how businesses collect, use, and share their personal information. The California Consumer Privacy Act (CCPA) of 2018 was intended…

Computers and Society · Computer Science 2022-07-26 Rex Chen , Fei Fang , Thomas Norton , Aleecia M. McDonald , Norman Sadeh

To protect users' privacy, legislators have regulated the usage of tracking technologies, mandating the acquisition of users' consent before collecting data. Consequently, websites started showing more and more consent management modules --…

Cryptography and Security · Computer Science 2022-09-14 Nikhil Jha , Martino Trevisan , Luca Vassio , Marco Mellia

As a result of the GDPR and the ePrivacy Directive, European users encounter cookie banners on almost every website. Many of such banners are implemented by Consent Management Providers (CMPs), who respect the IAB Europe's Transparency and…

Cryptography and Security · Computer Science 2020-02-24 Célestin Matte , Nataliia Bielova , Cristiana Santos

Free and open source software has gained a lot of momentum in the industry and the research community. The latest advances in privacy legislation, including the EU General Data Protection Regulation (GDPR) and the California Consumer…

Software Engineering · Computer Science 2025-12-12 Georgia M. Kapitsaki , Maria Papoutsoglou
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