Abstract—We report on the results of a measurement study
investigating the cookies, identifiers and other data stored on
Android handsets by Google Play Services, the Google Play
store and other pre-installed Google apps. We find that multiple
cookies and identifiers are sent by Google servers and stored on
the handset, even when no Google apps have ever been opened
by the user. This includes advertising analytics/tracking cookies,
links and device identifiers. No consent is sought for storing any
of this data and there is no opt out. To the best of our knowledge,
this study is the first to cast light on the cookies etc stored by
pre-installed Google apps.
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