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Photothermal Effect Controlled Complex Lasing for Decentralized Key Distribution
ACS Photonics ( IF 7 ) Pub Date : 2022-10-12 , DOI: 10.1021/acsphotonics.2c01018
Hong Yang Zhu 1 , Jin Chuan Zhang 1 , Wei Li Zhang 1
Affiliation  

Laser emission in complex structures actively generates unclonable randomness in multidimensional domains, which has great potential for information security. Especially, developing security protocols with extended functions is urgently demanded by the Internet of Things and blockchain applications. Here, a fiber-type microcavity complex laser is developed with a random output spectrum and a bistable output intensity, wherein the dye-doped liquid crystal is used as the gain and hysteretic-memory medium. The laser emits multiple spikes that vary randomly pulse-by-pulse in a relatively wide spectral band, and the logical/bistable “0” and “1” states of emission can be controlled by the photothermal effect. The lasers are proposed to act as active encryption units of end nodes in a network, wherein the spectra randomness is used to form random bit strings and the logical states are used to define the classification. Taking advantage of this hybrid advantage of complex lasing, a decentralized key distribution method is proposed with the function of key self-generation and self-direction at individual end nodes. This work would pave the way for information security in the decentralized network of multiscenario applications.

中文翻译:

用于分散式密钥分配的光热效应控制复合激光

复杂结构中的激光发射在多维域中主动产生不可克隆的随机性,具有巨大的信息安全潜力。尤其是物联网和区块链应用迫切需要开发具有扩展功能的安全协议。在这里,开发了具有随机输出光谱和双稳态输出强度的光纤型微腔复合激光器,其中染料掺杂液晶用作增益和滞后存储介质。激光器发射多个尖峰,这些尖峰在相对较宽的光谱带中逐脉冲随机变化,逻辑/双稳态“0”和“1”发射状态可以通过光热效应进行控制。激光器被提议充当网络中端节点的主动加密单元,其中,频谱随机性用于形成随机位串,逻辑状态用于定义分类。利用复杂激光的这种混合优势,提出了一种分散的密钥分发方法,该方法具有密钥在各个端节点的自生成和自导向功能。这项工作将为多场景应用程序的去中心化网络中的信息安全铺平道路。
更新日期:2022-10-12
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