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Using face detection to unlock electronic devices isn’t new. The problem with the technology is that it can be fooled using doctored photos, etc. Google proposes to overcome this shortcoming with “facial landmarks.” A recently filed patent describes a method for using a user’s facial expressions in place of a password to confirm a user’s identity. For example, a user may blink and tilt their head sideways. Additionally, the software may use the screen or flash of a device to emit a light into the user’s face and then check how that light is reflected.

Source: http://www.bbc.co.uk/news/technology-22790221

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