Good fingerprint replicas aren't easy to make. They take time and that's probably not feasible in most attack vectors.
Adequate replicas are easy to make. You should do a bit research regarding the sensors used by smartphones these days. Generally, I think a iris scanner would be a better option.History tells us that systems like Touch ID aren't easy to deceive with fake fingerprints, although it's obviously not impossible to do so. I'm not familiar with systems by other brands, but I assume the same applies. But yes, I agree 100% on retina scanning, as I've also suggested in my post. That would be the future. I'm curious as to what kind of randomness can we "extract" from an iris, as stated in my first post.
But building further on the fingerprint idea: you can further enhance the security of something protected by fingerprinting using one's lips. So 10 fingerprints + lips print would be way much more harder to obtain and it wouldn't make the process of recovering a wallet a bigger burden.
Jut my take on this topic... I think we can explore this much further, whether through the fingerprint topic or through the retina scan topic
