Hybrid structured phase mask in frequency plane for optical double image encryption in gyrator transform domain

2018 ◽  
Vol 65 (18) ◽  
pp. 2065-2078 ◽  
Author(s):  
Hukum Singh
Keyword(s):  
Image Encryption ◽  
Phase Mask ◽  
Transform Domain ◽  
Double Image ◽  
Gyrator Transform

Double-image encryption based on iterative gyrator transform

2008 ◽  
Vol 281 (23) ◽  
pp. 5745-5749 ◽  
Author(s):  
Huijuan Li ◽  
Yurong Wang
Keyword(s):  
Image Encryption ◽  
Double Image ◽  
Gyrator Transform

Double-image encryption by using chaos-based local pixel scrambling technique and gyrator transform

2013 ◽  
Vol 51 (12) ◽  
pp. 1327-1331 ◽  
Author(s):  
Huijuan Li ◽  
Yurong Wang ◽  
Haitao Yan ◽  
Liben Li ◽  
Qiuze Li ◽  
...  
Keyword(s):  
Image Encryption ◽  
Double Image ◽  
Gyrator Transform

scholarly journals 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

2021 ◽  
Author(s):  
Anshula ◽  
Hukum Singh
Keyword(s):  
Fresnel Lens ◽  
Phase Mask ◽  
Transform Domain ◽  
Complex Phase ◽  
Lower Upper ◽  
Partial Pivoting ◽  
Encryption And Decryption ◽  
The Matrix ◽  
Gyrator Transform ◽  
Optical Image Encryption

Abstract 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 (DL), vortex lens(VL), and Fresnel lens (FL). LUDPP is an operation used to decompose the matrix and is utilized to supersede the phase-truncation (PT) 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.

Optical Watermarking Method Based on Hyper-Chaotic Phase Mask in Gyrator Transform Domain

2019 ◽  
Vol 39 (9) ◽  
pp. 0907001
Author(s):  
刘禹佳 Yujia Liu ◽  
姜肇国 Zhaoguo Jiang ◽  
徐熙平 Xiping Xu ◽  
张福琦 Fuqi Zhang ◽  
徐嘉鸿 Jiahong Xu
Keyword(s):  
Phase Mask ◽  
Transform Domain ◽  
Gyrator Transform
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