'Unclonable' tag combats counterfeiters

47

To combat counterfeit products, a research team has developed a new method based on an authentication system using physical unclonable functions (PUFs).

To develop their anti-counterfeiting system, the researchers laser-printed QR codes on paper and then sprayed the PUF pattern on the surface.

The PUF inks contained microparticles, which formed random patterns that showed up as white spots on a black background when magnified. To validate their system, the team generated 10,000 tags and imaged them with a smart phone camera to establish a registry. Then, they re-imaged the tags with different smart phone readers and tried to match them to the registry.

The system correctly identified 76 per cent of the PUF tags. None of the tags were identified incorrectly, but some codes that were dirty or out-of-focus required an additional scan. The researchers estimate that the system can generate 2.5 × 10120 unique codes.

The team comprised Riikka Arppe-Tabbara, Mohammad Tabbara and Thomas Just Sørensen who reported their results in ACS Applied Materials & Interfaces.

Author
Bethan Grylls

Let’s block ads! (Why?)

New Electronics News

Get real time updates directly on you device, subscribe now.

Subscribe to our newsletter
Sign up here to get the latest news, updates and special offers delivered directly to your inbox.
You can unsubscribe at any time

Leave A Reply

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More