中国科学技术大学张群课题组近日探明了基于精细有机阳离子工程的二维杂化有机无机钙钛矿的高安全高效信息加解密。2025年5月6日，《德国应用化学》杂志发表了这一成果。

基于刺激响应发光（SRL）材料的光学加密在信息安全领域引起了极大的兴趣。金属卤化物钙钛矿作为一种新兴的SRL材料，在机密信息加密/解密（InfoED）应用方面显示出巨大的潜力。然而，在基于钙钛矿SRL的InfoED中确保高安全性并实现高读出效率是相当具有挑战性的。

研究组提出了一种独特的InfoED策略，通过精细的有机阳离子工程使用二维混合有机-无机钙钛矿，受益于其光致发光行为的高对比度和快速响应。通过在多种切换模式下运行的三密钥实现（即紫外线照射、温度控制和窄带滤波），可以有效地解密不可分割的加密信息，使其能够通过采用几乎无法破解的点阵图案场景来证明极高的安全性。作为原理证明，一个简单的2×2模式可以产生一个随机变量高达~10^{47}的代码字典，使用迄今为止最快的超级计算机El Capitan破解需要长达~10^{12}年的时间。研究组基于钙钛矿SRL的InfoED策略为基于光学加密的信息安全提供了一种有前景的解决方案。

附：英文原文

Title: High-Security and High-Efficiency Information Encryption/Decryption Based on Two-Dimensional Hybrid Organic–Inorganic Perovskites via Delicate Organic-Cation Engineering

Author: Ziang Chen, Zhoushilin Ruan, Shenlong Jiang, Qun Zhang, Yi Luo

Issue&Volume: 2025-05-06

Abstract: Optical encryption based on stimuli-responsive luminescence (SRL) materials has received enormous interest in the field of information security. Metal–halide perovskites, as a newly emerging SRL material, have shown great potential for confidential information encryption/decryption (InfoED) applications. However, it is rather challenging to ensure high security and achieve high readout efficiency in perovskite SRL-based InfoED. Herein, we present a unique InfoED strategy using two-dimensional hybrid organic–inorganic perovskites via delicate organic-cation engineering, benefiting from the high contrast and quick response of their photoluminescence behaviors. Indistinguishably encrypted information can be efficiently decrypted through triple-key implementation (i.e., ultraviolet-light irradiation, temperature control, and narrow-bandpass filtering) that operates in multiple switching modes, enabling us to demonstrate extremely high security by adopting dot-matrix patterning scenarios that are virtually uncrackable. As a proof of principle, a simple 2 × 2 patterning can yield a code dictionary with random variants as high as ~10^{47}, which will take as long as ~10^{22} years to crack using the hitherto fastest supercomputer El Capitan. Our perovskite SRL-based InfoED strategy provides a promising solution for information security based on optical encryption.

DOI: 10.1002/anie.202504327

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202504327