mobile devices present a problem when using fingerprinting for 3FA, and require frequent human intervention. This is a good thing. Fingerprinting is inherently

mobile devices present a problem when using fingerprinting for 3FA, and require frequent human intervention. This is a good thing. Fingerprinting is inherently opaque. That's why it's such a good third level security measure. It's a lot harder to spoof and, if someone tries, a lot easier to isolate the attempt.