Conventional scattering‐based encryption systems that operate based on a static complex medium which is used by all users are vulnerable to learning‐based attacks that exploit ciphertext‐plaintext pairs to model and reverse‐engineer the scattering medium's response, enabling unauthorized decryption without the physical medium. In this contribution, a new dynamic scattering‐channel‐based technique for multiuser image encryption is developed. The established approach employs variable, dynamic scattering media which are modeled as tunable aggregates of multiple scattering nanoparticles. The proposed system supports multiple users by allowing distinct combinations of scattering matrices for different time blocks, each combined with user‐specific complex‐valued coefficients, enabling the creation of unique, hard‐to‐guess encryption keys for each user. The derived methodology enhances the practical feasibility of multiuser secure communication and storage channels employing scattering media as the encryption mechanism.

中文翻译：

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基于动态散射通道的多用户图像加密方法


基于所有用户使用的静态复杂介质运行的传统基于散射的加密系统容易受到基于学习的攻击，这些攻击利用密文-明文对对散射介质的响应进行建模和逆向工程，从而能够在没有物理介质的情况下进行未经授权的解密。在这项贡献中，开发了一种新的基于动态散射通道的多用户图像加密技术。已建立的方法采用可变的动态散射介质，这些介质被建模为多个散射纳米粒子的可调聚集体。所提出的系统通过允许不同时间块的散射矩阵的不同组合来支持多个用户，每个时间块都与用户特定的复值系数相结合，从而能够为每个用户创建唯一的、难以猜测的加密密钥。该推导的方法增强了采用散射介质作为加密机制的多用户安全通信和存储通道的实际可行性。