It didn't take long for hackers to break the iPhone 5S' fingerprint unlock. All the CCC needed to defeat the scanner was an image of a user's fingerprint at 2,400 dpi resolution. That scan was “cleaned up”, inverted, and printed into a transparent sheet. The image of the print is then lifted from the sheet using latex milk or woodglue. “After it cures, the thin latex sheet is lifted from the sheet, breathed on to make it a tiny bit moist and then placed onto the sensor to unlock the phone,” the post states, adding that this technique can be used against “the vast majority” of fingerprint scanners.
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