Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China.
Small. 2021 May;17(20):e2100377. doi: 10.1002/smll.202100377. Epub 2021 Apr 18.
Optical encryption with easy operation, multichannel and high security has been one of the most significant technologies for information security. Stimuli-responsive luminescent materials have emerged as an ideal candidate for optical encryption, owing to its smart responsive property and high security. Herein, a type of light-responsive multicolor luminescent materials for high-security information encryption, which are fabricated by combining sensitizer, consumption unit, and emitter is developed. Different types of sensitizers to achieve different stimulus light responses, and multicolor light-responsive luminescent can be obtained by varying the composition of perovskite nanocrystals emitter can be selected. Both stimulus light and emission color can be used as distinguishable encoding dimensions, which enable multiplexed encoding with high capacity and complexity. Importantly, the controllable consumption can be manipulated by varying the concentration of consumption unit, so the programmed information encoded in different channels can be selectively read and erased simultaneously by varying stimulus light. The method makes the encryption information highly resistive to brute force trial-and-error attacks, which achieves high security level of information protection.
光学加密具有操作简单、多通道和高安全性等特点，是信息安全的重要技术之一。刺激响应发光材料因其智能响应特性和高安全性，已成为光学加密的理想候选材料。本文通过敏化剂、消耗单元和发射器的结合，开发了一种用于高安全性信息加密的光响应多色发光材料。不同类型的敏化剂可实现不同的刺激光响应，通过改变钙钛矿纳米晶发射器的组成，可以获得多色光响应发光。刺激光和发射颜色均可作为可区分的编码维度，从而实现大容量和高复杂度的复用编码。重要的是，通过改变消耗单元的浓度可以控制消耗，因此可以通过改变刺激光来选择性地读取和擦除不同通道中编码的信息。该方法使加密信息具有很高的抗暴力尝试攻击能力，实现了信息保护的高安全级别。
