TLDR Tech / InfoSec
Your Samsung Weather App Is a Fingerprint
Samsung's pre-installed Weather app quietly creates a highly unique fingerprint from the combination of saved location IDs (placeid) it sends to The Weather Company's API, with 96.4% of sampled devices uniquely identifiable across days. These fingerprints persist over time, survive IP and network changes, and can be resolved into precise locations using hardcoded API keys that work from any client. Requests often include both hashed placeid values and raw GPS coordinates, giving IBM's Weather Company and Samsung rich, granular location profiles that echo a broader industry pattern of monetizing weather-based location data.
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