Double image encryption using gyrator wavelet transform

2015 ◽  
Author(s):  
Isha Mehra ◽  
Naveen K. Nishchal
Keyword(s):  
Wavelet Transform ◽  
Image Encryption ◽  
Double Image

Image encryption based on Fractional wavelet transform, Arnold transform with the double random phases in HSV color domain

2020 ◽  
Vol 13 ◽  
Author(s):  
Aarushi Shrivastava ◽  
Janki Ballabh Sharma ◽  
Sunil Dutt Purohit
Keyword(s):  
Wavelet Transform ◽  
Image Encryption ◽  
Fractional Fourier Transform ◽  
Color Image ◽  
Random Phase ◽  
Arnold Transform ◽  
Time Frequency ◽  
Key Space ◽  
Secret Keys ◽  
Fractional Wavelet Transform

Objective: In the recent multimedia technology images play an integral role in communication. Here in this paper, we propose a new color image encryption method using FWT (Fractional Wavelet transform), double random phases and Arnold transform in HSV color domain. Methods: Firstly the image is changed into the HSV domain and the encoding is done using the FWT which is the combination of the fractional Fourier transform with wavelet transform and the two random phase masks are used in the double random phase encoding. In this one inverse DWT is taken at the end in order to obtain the encrypted image. To scramble the matrices the Arnold transform is used with different iterative values. The fractional order of FRFT, the wavelet family and the iterative numbers of Arnold transform are used as various secret keys in order to enhance the level of security of the proposed method. Results: The performance of the scheme is analyzed through its PSNR and SSIM values, key space, entropy, statistical analysis which demonstrates its effectiveness and feasibility of the proposed technique. Stimulation result verifies its robustness in comparison to nearby schemes. Conclusion: This method develops the better security, enlarged and sensitive key space with improved PSNR and SSIM. FWT reflecting time frequency information adds on to its flexibility with additional variables and making it more suitable for secure transmission.

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

Multiple-image encryption by using robust chaotic map in wavelet transform domain

Optik ◽  
2018 ◽  
Vol 171 ◽  
pp. 277-286 ◽  
Author(s):  
Chun-Lai Li ◽  
Hong-Min Li ◽  
Fu-Dong Li ◽  
Du-Qu Wei ◽  
Xuan-Bing Yang ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Image Encryption ◽  
Chaotic Map ◽  
Transform Domain ◽  
Multiple Image
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