Science China Materials ( IF 8.1 ) Pub Date : 2020-11-10 , DOI: 10.1007/s40843-020-1500-9 Fantao Meng , Malik Muhammad Umair , Shufen Zhang , Yao Meng , Bingtao Tang
Encryption materials represent a major direction of information security, but it is challenging to realize the ideal security combining the complete hiding of complex coding, stability in transmission, camouflage, and reliable decoding. Herein, we report an innovative strategy for rationally constructing encryption composite materials with high security and portability. Compared with common colloidal photonic watermarks, our encrypted optical devices are composed of thermoplastic polyurethanes (TPU) protective layers, polystyrene (PS) switching layers and a CdS coding layer. The optical shielding properties and phase state transition of PS layers enable high-level encoding and decoding security through thermal activation of light transmittance control. Meanwhile, the CdS layer can be clearly revealed in decoding mode because of the high refractive index. Besides, the confinement protection of integrated TPU films prevents the trilayer quasi-amorphous heterostructure from damage. To establish the practical advantage, portable information carriers can be prepared for camouflage. Accordingly, the reliable encoding and decoding system, and ability to integrate with easy-to-carry products, make our composites a potentially high-security encryption device for anti-fraud technology.
中文翻译:
具有三层准非晶异质结构的加密复合材料的便捷制造
加密材料代表了信息安全的主要方向,但是要实现理想的安全性,将复杂的编码的完全隐藏,传输的稳定性,伪装和可靠的解码结合起来,具有挑战性。在此,我们报告了一种创新策略,该策略可以合理地构建具有高安全性和便携性的加密复合材料。与普通的胶体光子水印相比,我们的加密光学设备由热塑性聚氨酯(TPU)保护层,聚苯乙烯(PS)开关层和CdS编码层组成。PS层的光学屏蔽特性和相态转变通过光透射控制的热激活实现了高级别的编码和解码安全性。与此同时,由于高折射率,在解码模式下可以清楚地显示CdS层。此外,集成的TPU薄膜的限制保护可防止三层准非晶异质结构受到破坏。为了建立实际的优势,可以准备便携式信息载体进行伪装。因此,可靠的编码和解码系统以及与易于携带的产品集成的能力使我们的复合材料成为用于反欺诈技术的潜在高安全性加密设备。