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The Breyer Case of the Court of Justice of the European Union: IP Addresses and the Personal Data Definition

Frederik Zuiderveen Borgesius


Case C-582/14 Patrick Breyer v Bundesrepublik Deutschland, Court of Justice of the European Union, 19 October 2016, not yet published, ECLI:EU:C:2016:779
A dynamic IP address of a website visitor is a piece of personal data for a website publisher, if the publisher has the legal means to identify the visitor, with the help of additional information held by the visitor’s Internet access provider.
Article 2(h) and Article 7(f) of the Data Protection Directive

Dr Frederik Zuiderveen Borgesius is a researcher at the IViR Institute for Information Law at the University of Amsterdam. He works on the Personalised Communication project. In 2018, he will start working at the LSTS Research Group on Law Science Technology & Society, in Brussels. For correspondence: <> and <>. Frederik would like to thank Damian Clifford, João Pedro Quintais and Tijmen Wisman for their helpful comments. DOI: 10.21552/edpl/2017/1/21


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