Titlebook: Reversible Steganography and Authentication via Transform Encoding; Jyotsna Kumar Mandal Book 2020 Springer Nature Singapore Pte Ltd. 2020

丰满中国

Nonlinear Dynamics in Transform Encoding-Based Authentication,on using chaotic map in association with Arnold’s cat map and hash function is given elaborately. GA-anchored chaos for generation of optimized chaotic seed is given in detail with algorithms and results.

喷出

chalice

离开可分裂

FID

-Transform-Based Reversible Encoding, in . domain are done elaborately. Embedding into the imaginary coefficients of transform domain of . is also given. A complete algorithm with implementation results is also given. Application of .-transformation is given at end.

空中

Conclusions,ns and image or message encryptions are also done. In general, the book focuses on the real part of the transform computations for embedding and extraction, but in cases of Z-transform, complex conjugate part is also used for embedding and authentication.

Fortuitous

Future Directions,ly, to avoid generation of imaginary components in transform domain for higher window size of subimages. Only in case of Z transformation, transformation computations, embedding, extraction are done in complex conjugate pair with a complete encoding scheme.

reaching

Pander

Infraction

Discrete Fourier Transform-Based Steganography,ir is given from where sub-image-based (small nonoverlapping window) reversible computations using DFT and IDFT is done. Numerical examples are given for both 1D and 2D DFT and IDFT transform computation for confirmation of reversibility. LSB encoding on 8 x 4 sub-image is also given completely with