The answer to that is more of "it depends". Some higher end fingerprint readers actually use small sound waves to verify the ridges on your fingers are indeed r

The answer to that is more of "it depends". Some higher end fingerprint readers actually use small sound waves to verify the ridges on your fingers are indeed ridges instead of a piece of photo paper with a HD fingerprint. Others use your fingerprint in addition to the heat signature your finger gives off, I'm sure there are others I'm not aware of, but both of the above have been proven defeatable with a mold + gummybear like material and warming it up slightly.