Image encryption using the Gyrator transform and random phase masks generated by using chaos

5th Colombian Conference of Engineering Physics

物理学;工业技术

Vilardy, Juan M.^1 ; Jimenez, Carlos J.^1 ; Perez, Ronal^1

Grupo GIFES, Faculty of Engineering, Universidad de la Guajira, Riohacha (La Guajira), Colombia^1

关键词: Chaotic functions;    Double random-phase encoding;    Gyrator transform;    Image encryption and decryption;    Image encryptions;    Images encryptions;    Random permutations;    Random phase masks;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/850/1/012012/pdf
DOI  :  10.1088/1742-6596/850/1/012012

学科分类：工业工程学

来源: IOP

【 摘 要 】

The Gyrator transform (GT), chaotic random phase masks (CRPMs) and a random permutation of the Jigsaw transform (JT) are utilized to design an images encryption-decryption system. The encryption-decryption system is based on the double random phase encoding (DRPE) in the Gyrator domain (GD), this technique uses two random phase masks (RPMs) to encode the image to encrypt (original image) into a random noise. The RPMs are generated by using chaos, these masks are CRPMs. The parameters of the chaotic function have the control of the generation of the CRPMs. We apply a random permutation to the resulting image of the DRPE technique, with the purpose of obtaining an encrypted image with a higher randomness. In order to successfully retrieve the original image (without errors or noise-free) at the output of the decryption system is necessary to have all the proper keys, which are: the rotation angles of the GTs, the parameters of the chaotic function utilized to generate the two CRPMs and the random permutation of the JT. We check and analyze the validity of the image encryption and decryption systems by means of computing simulations.