Do Smartphone Sensors Present Security Risk?
Variations in how different smartphone accelerometers record data raise concerns that advertisers, intelligence agencies or others could use this information to identify individual devices.
That warning comes via security researcher Hristo Bojinov, a computer science Ph.D. candidate at Stanford University who's been working with a team of researchers to test whether the sensors inside smartphones might pose a privacy risk, the San Francisco Chronicle first reported.
To date, the Stanford researchers have discovered that the accelerometers built into smartphones, which measure device acceleration and orientation -- used, for example, by the operating system to rotate displays -- don't all record reality in quite the same way.
For example, when a smartphone is resting flat on a tabletop, the reading generated by the accelerometer -- which measures acceleration along the Z-axis, which in this example would be a line rising perpendicularly from the smartphone -- should be -1 when it's lying face up, or +1 when lying face down. But in reality, a face-down device generates a Z-axis measurement that's more akin to 1.00281308281. Read full story on InformationWeek
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