A Hybrid Algorithm for Secure Image based Encryption and Steganographic Technique in combination with DET and AES Algorithms
D. Vinod, M. K. Nalini, K Dhinakaran, D Elantamilan, R. Gnanavel · 2022 International Conference on Advances in Computing, Communication and Applied Informatics (ACCAI) · 2022
Instead of using a complex mathematical equation to key a host image, this Image Encryption algorithm uses a hybrid wavelet algorithm to increase the host image's possibilities. Here, we split different regions of the host image and the fusing image by using DWT and intermixing those regions to achieve another vision processed by DWT of the same format, which inversion results in an encrypted image. Even a brute force assault can't break the association between this original image and the fused image using a basic keying strategy. When decrypting this picture, we need to know the key and dummy image used to connect it. It would be hard to decrypt this Image matrix without knowing its layout, and the decryption time is supposedly longer than the encryption period. And Using steganography, data may be made to appear as if they never existed in another media, allowing for secure communication. Secure communication is achieved through the use of steganography. Steganography utilizing the DWT (Discrete Wavelet Transform) is proposed in this study, which uses a coefficient replacement technique to boost security while maintaining high capacity. The cover picture is encrypted using the Advanced Encryption Standard (AES) with a modification, while the payload image is encrypted using Haar and biorthogonal DWT. The payload image's high-frequency bands contain the resulting coefficients of the payload picture. A new concept is being introduced to create an intermediate stage picture: using encrypted payload to replace the HH sub-band coefficients. The suggested approach outperforms current ones in terms of both capacity and security.