Asymmetric double-image encryption using twin decomposition in fractional Hartley domain

IF 0.7 4区 物理与天体物理 Q4 OPTICS Optica Applicata Pub Date : 2022-01-01 DOI:10.37190/oa220102
J. Kumar, Phool Singh, Akash Yadav
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引用次数: 2

Abstract

Twin decomposition, consisting of equal and random modulus decompositions, not only makes a cryptosystem asymmetric but also resists special attack. A new double-image asymmetric cryptosystem using twin decomposition in fractional Hartley domain is proposed. An input grayscale image, bonded with another grayscale image as its phase mask, is transformed via fractional Hartley transform. Equal modulus decomposition is applied on the resulting image, giving us two intermediate images. One of them is subjected to another fractional Hartley transform followed by random modulus decomposition, whereas the other serves as the first private key. The application of random modulus decomposition also results in two images: encrypted image and the second private key. During the process of decryption, firstly the encrypted image is combined with second private key and thereafter it is subjected to inverse fractional Hartley transform. The resulting image is then combined with the first private key, and followed by another inverse fractional Hartley transform, thus recovering the two original images. The proposed cryptosystem is validated for pairs of grayscale images.
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基于分数阶Hartley域双分解的非对称双图像加密
双分解由等模分解和随机模分解组成,不仅使密码系统具有非对称性,而且可以抵抗特殊攻击。利用分数阶Hartley域的孪生分解,提出了一种新的双象非对称密码系统。输入的灰度图像与另一灰度图像结合作为相位掩模,通过分数阶哈特利变换进行变换。对得到的图像进行等模分解,得到两个中间图像。其中一个进行分数阶Hartley变换,然后进行随机模分解,另一个作为第一私钥。随机模分解的应用也产生了两个图像:加密图像和第二个私钥。在解密过程中,首先将加密图像与第二私钥组合,然后对其进行分数阶逆哈特利变换。然后将得到的图像与第一个私钥组合,然后进行另一个逆分数哈特利变换,从而恢复两个原始图像。对灰度图像对所提出的密码系统进行了验证。
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来源期刊
Optica Applicata
Optica Applicata 物理-光学
CiteScore
1.00
自引率
16.70%
发文量
21
审稿时长
4 months
期刊介绍: Acoustooptics, atmospheric and ocean optics, atomic and molecular optics, coherence and statistical optics, biooptics, colorimetry, diffraction and gratings, ellipsometry and polarimetry, fiber optics and optical communication, Fourier optics, holography, integrated optics, lasers and their applications, light detectors, light and electron beams, light sources, liquid crystals, medical optics, metamaterials, microoptics, nonlinear optics, optical and electron microscopy, optical computing, optical design and fabrication, optical imaging, optical instrumentation, optical materials, optical measurements, optical modulation, optical properties of solids and thin films, optical sensing, optical systems and their elements, optical trapping, optometry, photoelasticity, photonic crystals, photonic crystal fibers, photonic devices, physical optics, quantum optics, slow and fast light, spectroscopy, storage and processing of optical information, ultrafast optics.
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