Dynamic Anti-Counterfeiting Labels with Enhanced Multi-Level Information Encryption

Area of Science:

• Materials Science
• Optoelectronics
• Information Security

Background:

• Information encryption is crucial for anti-counterfeiting label security.
• Current labels face challenges in multi-functionality, high security, low cost, and easy identification.
• Dynamic optical properties offer a promising avenue for advanced anti-counterfeiting measures.

Purpose of the Study:

• To develop a multi-dimensional, multi-level dynamic optical anti-counterfeiting label.
• To enhance label security through time-varying optical characteristics and physical unclonable functions (PUFs).
• To enable fast and accurate identification of authentic labels.

Main Methods:

• Utilized inkjet and screen printing technologies.
• Incorporated instantaneously luminescent quantum dots and long afterglow phosphors.
• Developed self-assembled quantum dot patterns for PUF implementation.
• Employed convolutional residual neural networks for information decoding.

Main Results:

• Constructed a dynamic optical anti-counterfeiting label with time-varying color and luminous intensity.
• Achieved enhanced information encryption via temporal dimension variations and PUFs.
• Demonstrated fast and accurate label identification using neural networks.

Conclusions:

• The developed label offers a high security factor and improved anti-counterfeiting capabilities.
• The combination of dynamic optics and PUFs provides a robust solution for information encryption.
• The use of neural networks facilitates efficient and reliable authentication.