> I think it won't be too long until they can dust your fingerprints, take a picture of it, then have it 3d printed on a substrate that will fool a simple fingerprint scanner.

I'm struggling to find good references right at this moment - but I've seen reports/video of this being done using more basic means, years ago. But I may be misremembering details.

It seems that it's already possible to produce usable fingerprints using a laser printer, printable transparencies (i.e for overhead projectors), and some glue.

The idea is that you print the inverted fingerprint on a transparency. Because the transparency doesn't allow the toner to absorb in, it remains on the surface as a 3D structure.

You then apply glue to that structure, and wait for it to cure. After it cures it can be removed and trimmed to fit your finger, and then applied to your finger.

This apparently is reliable enough to fool basic fingerprint scanners, even ones with 'liveness' checks for conductivity/pulse because the glue is conductive and transparent enough for those basic checks.

Examples of similar things:

https://blog.lookout.com/why-i-hacked-apples-touchid-and-sti...

https://www.instructables.com/How-To-Fool-a-Fingerprint-Secu...