I suspect there is a fair amount of anti-counterfeiting government effort that we never hear about. There are already mechanisms in place in some photocopiers

I suspect there is a fair amount of anti-counterfeiting government effort that we never hear about. There are already mechanisms in place in some photocopiers and image editing programs to prevent the reproduction of currency images: http://en.wikipedia.org/wiki/EURion_constellation http://en.wikipedia.org/wiki/EURion_constellation