South Dakota researchers have discovered a way to create invisible quick response codes, which may be a big help to discourage counterfeiting. Yes, it’s now possible to create QR codes that cannot be seen by the naked eye. How?
These invisible QR codes are made from nanoparticles of green and blue fluorescent ink that can only be seen under near-infrared laser light. These nanoparticles absorb photons at a non-visible wavelength then emit them in a visible wavelength. This process is called upconversion. And only when you have held the QR code under laser light and it becomes visible can you scan it in the traditional manner, using your smartphone.
This new technique was developed by researchers from the South Dakota School of Mines and Technology and the University of South Dakota specifically as a means of authentication. Because these invisible codes are complex and because they can have additional security features — like a specific concentration of nanoparticles or a different intensity for the upconverting light — they are hard to replicate. Also, the researchers said that they can take the security level from covert to forensic by just adding a microscopic message into the code in a different colored upconverting ink, requiring a microscope to read the uconverted code.
These codes will therefore be great when printed on banknotes, bills and other goods that can be counterfeited easily. In fact, the researchers believe that these invisible codes can be printed on virtually any solid surface. An invisible code can be added to any of these objects without altering their physical appearance.
The researchers first generated a typical QR code using an online QR code generator then converted the code into a file that’s suitable for printing via an aerosol jet printer. The process took them 90 minutes, but this can be reduced to 15 minutes if done commercially or if mass printed.
More articles in this topic
Talk about marketing and you will get differing opinions on what works and what is effective. We have seen a lot of success stories as far as marketing is concerned, and this one is no exception. Martell Noblige Cognac brought together different types of marketing to come up with its latest campaign. The theme for […]Read more
When it comes to the environment, we all have to pitch in. While it is best to minimize the amount of waste we produce, there is still garbage that we have to take care of. One of the best ways to dispose garbage is to segregate it. You can always sell recyclable materials such as […]Read more
Parents of kids with autism have many fears. One of them is losing their kids as they wander off to some place they are not familiar with. QR codes have been helping parents with autistic kids. It is a fact that most kids with autism will wander and get lost with their parents. It happened […]Read more
- German Charity Uses QR Codes to Get Donations
- Castle Rock Historical Society Uses QR Codes to Recount History
- Mobile Marketing: Why It Makes Sense to Use Near-Field Communication and QR Codes
- Google Uses HTML5 to Make Android.com a Lot More User-Friendly
- Berlin Street Art Made More Interesting With QR Codes
- Nordstrom’s Joins the Rooftop QR Code Craze
- QR Code Enabled Nokia Phones
- QR Code Treasure Hunt Holiday Game
- Dupont Buys Into QR Code
- No More Queues At Bus Stops With QR Code
Google Android news and discussion.
Deliver latest top technology stories and breaking IT news
Near Field Communication (NFC) news, ideas, projects and technologies.
QR Code, Datamatrix and other two dimensional barcode news and analysis.
Tips, advices, how-to's and DIYs for the latest technologies.