A Secure And High Capacity Image Steganography Technique
Hemalatha S, U Dinesh Acharya, Renuka A, Priya R. Kamath

TL;DR
This paper introduces a novel, secure, high-capacity image steganography method using Integer Wavelet Transform that conceals multiple images and keys with high visual fidelity and superior PSNR compared to existing techniques.
Contribution
The paper presents a new steganography approach capable of hiding multiple secret images and keys in a color cover image using IWT, improving capacity and image quality.
Findings
No visual difference between cover and stego images
High PSNR values for both stego and extracted images
Outperforms existing methods in PSNR for multiple image hiding
Abstract
Steganography is the science of invisible communication. The purpose of Steganography is to maintain secret communication between two parties. The secret information can be concealed in content such as image, audio, or video. This paper provides a novel image steganography technique to hide multiple secret images and keys in color cover image using Integer Wavelet Transform (IWT). There is no visual difference between the stego image and the cover image. The extracted secret images are also similar to the original secret images. Very good PSNR (Peak Signal to Noise Ratio) values are obtained for both stego and extracted secret images. The results are compared with the results of other techniques, where single image is hidden and it is found that the proposed technique is simple and gives better PSNR values than others.
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