DWT-Based Steganography for Image Transmission

Due to internet development, data transfer becomes faster and easier to transmit and receive different data types. The possibility of data loss or data modification by a third party is high. So, designing a model that allows stakeholders to share their data confidently over the internet is urgent. Steganography is a term used to hide information and an attempt to conceal the existence of embedded information in different types of multimedia. In this chapter, a steganography model is proposed to embed an image into a cover image based on DWT approach as the first phase. Then, the embedded secret image is extracted from the stego-image as the second phase. Model performance was evaluated based on signal noise ratio (SNR), PSNR, and MSE (mean square error). The proposed steganographic model based on DWT is implemented to hide confidential images about a nuclear reactor and military devices. The findings indicate that the proposed model provides a relatively high embedding payload with no visual distortion in the stego-image. It improves the security and maintains the hidden image correctness.