13.09.2012 07:07 Uhr, Quelle: Engadget

New 'nano-code' could help fight banknote forgery by embedding invisible QR-style ciphers

We've all seen (and probably used) QR codes at some point. And, handy as they are for quick linking to apps, or value added content etc, there's usually not much else going on. Unless you're one of the team at South Dakota School of Mines and Technology, that is, who have created a tiny version of the quadrilateral-codes that could be used to spot counterfeit money. The invention uses nanoparticles combined with blue and green fluorescent ink, and can be sprayed onto surfaces such as glass, plastic film, or of course, pictures of American presidents. The nano-c

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