Conventional Non-Fluorescent Polymers: Unconventional Security Inks for Data Storage and Multidimensional Photonic...

Area of Science:

• Materials Science
• Polymer Chemistry
• Data Security

Background:

• Traditional security inks using fluorescent molecules are vulnerable to forgery due to simple UV-light readout.
• Advancements in counterfeiting technologies necessitate more sophisticated security measures.

Purpose of the Study:

• To develop a multidimensional data-encryption method for high-security inks.
• To create a robust security system that overcomes the limitations of conventional fluorescent security inks.

Main Methods:

• Developed a "lock-key" mechanism using non-fluorescent invisible polymer inks (lock) and anti-rigidochromic fluorophores (keys).
• Utilized polymer properties (chemical structure, molecular weight, topology, sequence, phase structure) to dictate programmed emissions for decryption.
• Implemented a data-encryption matrix based on three polymers for a high-security level.

Main Results:

• Achieved triply encrypted data with a significantly enhanced security level, demonstrated by a low probability of successful decryption (1 in 20,000 keys).
• Showcased distinct intensity, wavelength, and chirality in decrypted data compared to intrinsic fluorophore emissions.
• Confirmed that fluorophores lacking anti-rigidochromism fail in selective ink illumination and data decryption.

Conclusions:

• The developed non-fluorescent polymer-based security ink system offers a superior alternative to conventional fluorescent inks.
• The unique properties of polymers, including diverse topologies and structures, provide inherent resistance to imitation.
• This approach significantly boosts data security, making it difficult to forge or tamper with encrypted information.