Is Your Cell Phone Accelerometer Tracking You?
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There was an interesting story last week on SFGate about some new Stanford University research into how sensors on smartphones could be used for tracking people.
To make a long story short, the researchers found that every smartphone that has an accelerometer movement sensor has a unique digital fingerprint. That is, through careful analysis, subtle differences in sensors from different phones can help identify a specific phone or user. The concern is that, unlike other forms of tracking, this is one that a user could not opt out of or shut down.