Opt Lett. 2023 Jul 1;48(13):3491-3494. doi: 10.1364/OL.496096.
In this Letter, a new, to the best of our knowledge, scheme is proposed to realize high-fidelity secured free-space optical information transmission through dynamic and turbulent media by encoding 2D information carriers. The data are transformed into a series of 2D patterns as information carriers. A novel differential method is developed to suppress noise, and a series of random keys are also generated. A different number of absorptive filters are arbitrarily combined to be placed in the optical channel to generate ciphertext with high randomness. It is experimentally demonstrated that the plaintext can be retrieved only when correct security keys are applied. Experimental results demonstrate that the proposed method is feasible and effective. The proposed method provides an avenue for securing high-fidelity optical information transmission over dynamic and turbulent media in a free-space optical channel.
在这封信件中，我们提出了一种新的方案，通过对二维信息载体进行编码，实现了通过动态和湍流介质进行高保真安全自由空间光信息传输。这些数据被转换为一系列二维图案作为信息载体。我们开发了一种新颖的差分方法来抑制噪声，并生成了一系列随机密钥。任意组合多个吸收滤波器放置在光学信道中，以生成具有高随机性的密文。实验证明，只有应用正确的安全密钥才能检索明文。实验结果表明，该方法是可行和有效的。该方法为在自由空间光信道中通过动态和湍流介质进行高保真光学信息传输提供了一种途径。
