Color image encryption using MSVD, DWT and Arnold transform in fractional Fourier domain

This paper presents, a new image encryption technique using Multiresolution Singular Value Decomposition (MSVD), Discrete Wavelet Transform (DWT) and Arnold transform in fractional domain. Images are encrypted using keys of FrFT, subbands of MSVD and DWT along with the use of parameters generated by MSVD in various DWT subbands and Arnold transform. We have used keys of FrFT, the arrangement of MSVD and wavelet subbands, values and arrangement of parameters generated by MSVD in various DWT subbands, the use of Arnold transform and the way of arrangement of several subimages as encryption and decryption keys. For the correct decryption of encrypted images it is required to have correct knowledge of all the keys in correct order along with their exact values. The effectiveness of proposed work is analyzed by comparing it with some related works, the comparison verifies that the proposed work has obtained an increased level of security and robustness when compared to exiting works. (C) 2017 Elsevier GmbH. All rights reserved.