Abstract
AbstractThis paper proposes a new image encryption based on circular shift on linear canonical transform, i.e., gyrator transform. We review various optical image encryption techniques proposed and inspired by the double random phase encoding (DRPE) system in the literature review. Also, we discussed optically inspired encryption techniques Fourier transform, fractional Fourier transform (FrFT), quadratic phase system (QPS), gyrator transform (GT), Fresnel transform (FrT), possible attacks and challenges in literature review and then explained various image scrambling techniques Jigsaw transform (JT) and Arnold transform (ART). Image encryption transforms are numerically implemented and compared with different DRPE schemes. Applied circular shift with Linear canonical transform (LCT) based transforms Fresnel transform, Gyrator transform, and compare the results of MSE, PSNR, and Histogram. The challenges faced in this area and the objectives of research have been discussed. This new circular shift approach provides adequate means security with acceptable complexity.KeywordsOptical image encryptionLinear canonical transformImage scramblingCircular shiftGyrator transform
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