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首页> 外文期刊>Optical and quantum electronics >Security-enrichment of an asymmetric optical image encryption-based devil's vortex Fresnel lens phase mask and lower upper decomposition with partial pivoting in gyrator transform domain
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Security-enrichment of an asymmetric optical image encryption-based devil's vortex Fresnel lens phase mask and lower upper decomposition with partial pivoting in gyrator transform domain

机译：基于不对称的光学图像加密的魔鬼涡流叶片镜镜相位掩模和较低上分解的安全性偏向于旋转器变换域中的部分枢转

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摘要

An asymmetric optical cryptosystem to encrypt images using devil's vortex Fresnel lens (DVFLs) phase masks and lower upper decomposition with partial pivoting (LUDPP) is proposed in gyrator transform domain. The proposed cryptosystem utilizes DVFLs which are the complex phase masks designed using the combination of a phases of devil's lens, vortex lens, and Fresnel lens. LUDPP is an operation used to decompose the matrix and is utilized to supersede the phase-truncation task in the traditional phase-truncated Fourier transform (PTFT). Hence, the proposed method is immune to the attacks to which the PTFT-based cryptosystems are vulnerable. The cryptosystem is asymmetric as both the encryption and decryption processes are different along with different keys. The private keys generated during the encryption process are utilised in the decryption process to retrieve the original image. The encryption and decryption process can be realised with both the digital and the modified optical architecture. In order to show the strength and robustness of the proposed encryption, a conspire numerical simulation was performed.
机译：在旋转器变换域中提出了使用Devil的涡流菲涅耳透镜（DVFL）相位掩模和利用部分枢转（LUDPP）的较低上部分解来加密图像的不对称光密码系统。所提出的密码系统利用DVFL，这是使用魔鬼镜头，涡流镜头和菲涅耳镜的阶段的组合设计的复杂相掩模。 LUDPP是用于分解矩阵的操作，并且用于在传统的相位截断的傅立叶变换（PTFT）中取代相位截断任务。因此，所提出的方法对PTFT的密码系统易受伤害的攻击免疫。密码系统是不对称的，因为加密和解密过程都与不同的键不同。在加密过程中生成的私钥在解密过程中使用以检索原始图像。可以使用数字和修改的光学架构实现加密和解密过程。为了展示所提出的加密的强度和稳健性，执行了伴随数值模拟。

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