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Improved method of attack on an asymmetric cryptosystem based on phase-truncated Fourier transform

机译:基于相位截断傅立叶变换的非对称密码系统的改进攻击方法

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We propose an improved method of attack on an asymmetric cryptosystem based on a phase-truncated Fourier transform. With the proposed method of attack, an attacker is able to access the exact decryption keys and obtain precise attack results. The method is based on a novel median-filtering phase-retrieval algorithm. Compared with existing attacks, the proposed attack has the following advantages: (1) exact information of the original image can be obtained in gray-scale and binary forms; (2) better computing efficiency; (3) more robust against noise and occlusion contaminations. Numerical simulation results show the effectiveness and robustness of the proposed method. Based on the proposed method of attack, we further propose a new cryptosystem, which not only enhances the security of the system but also does not require truncated phases. (C) 2015 Optical Society of America
机译:我们提出了一种基于相位截断傅立叶变换的非对称密码系统攻击的改进方法。使用提出的攻击方法,攻击者可以访问确切的解密密钥并获得准确的攻击结果。该方法基于一种新颖的中值滤波相位检索算法。与现有攻击相比,该攻击具有以下优点:(1)可以灰度和二进制形式获得原始图像的准确信息; (2)更好的计算效率; (3)对噪音和咬合污染的抵抗力更强。数值仿真结果表明了该方法的有效性和鲁棒性。基于提出的攻击方法,我们进一步提出了一种新的密码系统,它不仅增强了系统的安全性,而且不需要截断阶段。 (C)2015年美国眼镜学会

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