The use of biometrics for digital security has multiple problems:
The Technology Problem
The Social Acceptability Problem
The Clonability Problem
The Life and Limb Problem
The technology problem is that today's biometric technologies are not yet cost-effective enough for everyday use if you want anywhere close to six-sigma performance at a reasonable price.
The social acceptability problem includes sense of privacy of the public. People, in general, do not want parts of their body duplicated in databases.
The first two problems could potentially be overcome. However, the clonability problem is the one problem which I believe is insurmountable. Biometrics will not work for cyber access to digital systems because biometrics cannot be changed and cannot be kept secret. Biometrics are clonable...
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