France's data protection authority, the Commission nationale de l'informatique et des libertés, launched a study to investigate data flows of mobile applications by examining location data. As part of the study, the CNIL will purchase a file from a data broker with timestamped geolocation data that features more than 5 million smartphone advertising identifiers from a one-week period in 2021. The CNIL will check if it is able to reidentify the persons whose smartphone data was purchased and, if so, it would inform them individually.
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