Delta’s Biometric Digital ID Program Expands to 3 Major US Airports
(www.activistpost.com)
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Digital security works both ways.. If you have a copy of the key, you can re-create the lock; if you have a copy of the lock, you can re-create the key. Once your biometric parts are scanned for security, they're reduced to a digital set of data. Once that data gets compromised, the 'key' can be recreated.. whether it be fake fingerprints, a mask, retina.. or any other biometric component.
In using any biometric security, you are trusting the system to keep your biometric makeup private.. It's one thing if your password gets leaked.. If your biometric data gets leaked, there is no changing it for the next use case.
Most biometric security systems only store the key in the form of an output of a one-way hash function where the input is the scan data. You cannot recreate the input from that output, nor can it be used as the key.