The leak is the result of a hack at Gravy Analytics, a data broker that collates location data from across mobile devices (including millions of iPhone and Android users) and sells it to other companies. As TechCrunch reports, the dataset contains more than 30 million location points—including healthcare clinics, military bases, and government buildings—for devices around the world. Worse, the data could potentially be de-anonymized and used to track the past movements of individuals.
While you can't reverse a data breach, you can take steps to protect your location data from the advertisers that collect your data and the brokers that sell it in the future. For internet browsing, an ad blocker like Privacy Badger can prevent ads from loading and displaying on websites and tracking your web activity.
Delete add tracking identifiers on Android
Android users can go to Settings > Security & Privacy > Privacy > Ads and tap Delete advertising ID to permanently delete your MAID. You can also audit and revoke app tracking permissions from Settings > Privacy & Security > Privacy Controls > Permission Manager.
Delete add tracking identifiers on iPhone
Privacy & Security > Tracking. Toggle off Allow apps to Request to Track or remove permissions for individual apps. You can also deny permission to track when you install a new app. Finally, disable Apple's targeted ads under Settings > Privacy > Apple Advertising by toggling off Personalized Ads.
The Electronic Frontier Foundation also notes that using airplane mode will prevent apps from sending your location to data brokers in real time, so if you are concerned about maintaining privacy en route to a sensitive destination, you should download your maps so you can use navigation while offline.
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