Light‐Responsive Luminescent Materials for Information Encryption Against Burst Force Attack. Issue 20 (18th April 2021)

• Record Type: Journal Article
• Authors: Zhou, Qianwen; Qiu, Xiaochen; Su, Xianlong; Liu, Qian; Wen, Yue; Xu, Ming; Li, Fuyou
• Is Part Of: Small. Volume 17:Issue 20(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-04-18
• Subjects: afterglow luminescence -- color manipulation -- information encryption -- light‐responsive luminescent materials -- perovskite nanocrystals; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202100377
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: 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. Abstract : A series of excitation and emission color tunable light‐responsive afterglow materials based on perovskite nanocrystals are demonstrated. Both excitation and emission can be used as distinguishable encoding dimensions without any crosstalk. Moreover, these materials can be erased by light, whose process can be controlled by adjusting the excitation irradiance, applying in information encryption against burst force attack.