A high security coding and anti-counterfeiting method based on the nonlinear magnetization response of...

Area of Science:

• Materials Science
• Nanotechnology
• Applied Physics

Background:

• Traditional anti-counterfeiting methods (graphic, digital, magnetic labels) are losing effectiveness due to market popularity.
• There is a need for advanced, difficult-to-imitate coding technologies to combat product counterfeiting.

Purpose of the Study:

• To present a new magnetic anti-counterfeiting coding method utilizing superparamagnetic nanomaterials.
• To demonstrate the efficacy of this method in verifying product authenticity and its potential for industrial applications.

Main Methods:

• Development of a high-performance coding material based on superparamagnetic nanomaterials with controlled particle size.
• Implementation of a 12-site coding system and a screening model measuring voltage amplitude.
• Utilizing a self-developed magnetic encoding and decoding system for authenticity verification.

Main Results:

• The magnetic coding method leverages nonlinear magnetization response differences.
• The system can code and decode 9000 products with 97% single detection accuracy in under a minute.
• The coding's reliance on nanomaterial production batches makes it difficult to imitate.

Conclusions:

• The proposed magnetic coding technology offers a robust and novel solution for anti-counterfeiting.
• This method provides a stable, long-term coding and decoding solution with high accuracy and efficiency.
• The technology has broad potential applications across various industries requiring product authentication.