Chaos Encrypted Images on Lossless and Reversible Data Hiding using Wavelet Transform

EasyChair Preprint 2345

Abstract

Steganography is a process of secret writing or covered writing. This method is implemented to hide information in a protected medium for covered/secret communication. In this process, images will be used as the protected medium for hiding secret data. In this paper an enhanced method of transferring secret data through encrypted images has been implemented. Where, histograms of images are evaluated to detect the types of images for different capacity. Then, DWT algorithm is applied for the grey-scale images to improve the performance. Chaos method is used to encrypt the secret data before embedding the data in lossless and Reversible Data Hiding (RDH) into the protected image and it is encrypted by using encryption key. The images are fused before embedding the encrypted data, and then by using LSB replacement algorithm the data is inserted in the pixels of fused image. For the extraction of secret data a decryption key and IDWT is used to recover the original cover. In this enhanced method, a covered double image is implemented for security problem.

Keyphrases: DWT, Encryption, Reversible data hiding, Steganography, reversible data hiding in encrypted domain

@booklet{EasyChair:2345,
  author    = {Konduru Upendra Raju and N Amutha Prabha},
  title     = {Chaos Encrypted Images on Lossless and Reversible Data Hiding using Wavelet Transform},
  howpublished = {EasyChair Preprint 2345},
  year      = {EasyChair, 2020}}