Generating Images from Templates

The question of image recreation from templates is a complicated one. The industry has long held that one of the primary benefits from a security and privacy perspective is that the image (or, more broadly, identifiable data) cannot be recreated or regenerated from the template. Since images cannot be recreated, the logic goes, a hacked database cannot be used to manufacture a fingerprint or other biometric for hostile purposes such as placing a fingerprint at a crime scene or logging into a private network.

However, a recent story from the Canberra Times (Australia) indicated that a student was able to access an unencrypted template, determine how the vendor encoded features, and rebuild an image that was capable of being fed into the system to gain access. This calls into question claims regarding non-recreation of image data from templates, just as recent liveness reports call into question susceptibility to spoofing.

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