Dynamic Cryptography through Plasmon-Enhanced Fluorescence Blinking
Dynamic Cryptography through Plasmon-Enhanced Fluorescence Blinking
复制标题
通过等离激元增强荧光闪烁的动态密码学
DOI：
10.1002/adfm.202201372
复制
发表时间：
2022
影响因子：
19
通讯作者：
Guang-Can Li
中科院分区：
文献类型：
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作者：
Yongfeng Lu;Hongrui Cheng;Guang-Can Li
将加密原始技术与物理不可克隆函数（puf）相结合已成为单向加密的新范式。在此，作者报告了一种基于等离子体荧光的动态PUF密码原语，这种荧光是由嵌入在等离子体贴片纳米天线纳米间隙中的单个或多个染料分子发出的。该密码原语携带两组高容量光学代码：嵌入染料分子的荧光闪烁和等离子体纳米天线实现的多色光散射。前者允许通过保持“1”（亮态）或“0”（暗态）从大量单个等离子体贴片纳米天线生成时间二进制代码，而后者提供永久的基于颜色的新代码，作为身份验证的解密通道。利用纳米间隙内的高电磁场和等离子体纳米天线的大Purcell增强，荧光闪烁很容易被普通荧光显微镜以汞弧灯作为低功率激发源检测到。所开发的动态PUF代码通过自编程的计算机视觉算法进行鲁棒性和准确性验证。该研究将传统的静态PUF加密技术转变为基于纳米光子学的动态加密技术，为下一代先进的防伪技术开辟了新的途径。
Merging cryptographic primitive technologies and physical unclonable functions (PUFs) have become a new paradigm of one‐way encryption. Herein, the authors report a dynamic PUF cryptographic primitive based on plasmonic fluorescence blinking from single or a few dye molecules embedded within the nanogaps of plasmonic patch nanoantennas. This cryptographic primitive carries two sets of high‐capacity optical codes: the fluorescence blinking of the embedded dye molecules and multi‐color light scattering enabled by the plasmonic nanoantennas. The former allows the generation of temporal binary codes from a large number of individual plasmonic patch nanoantennas by holding either “1” (bright state) or “0” (dark state), while the latter provides a permanent color‐based novenary code that acts as a decryption channel for authentication. Benefiting from the high electromagnetic field localized within the nanogaps and the large Purcell enhancement of the plasmonic nanoantennas, the fluorescence blinking is readily detectable by a common fluorescence microscope with a mercury arc lamp as a low‐power excitation source. The developed dynamic PUF codes are robustly and accurately authenticated by a self‐programmed computer vision algorithm. This study revolutionizes the conventional static PUF encryption to nanophotonics‐based dynamic encryption, opening a new avenue for next‐generation advanced anti‐counterfeiting.