This is 1) a good demonstration that a fingerprint is not a secret, and 2) a great political hack. Wolfgang Schauble, Germany's interior minister, is a strong supporter of collecting biometric data on everyone as an antiterrorist measure. Because, um, because it sounds like a good idea. Here's the story directly from the Chaos Computer Club (in German), and its Engligh-language guide to lifting and using fingerprints. And me on biometrics from 10 years ago.