Izvorni znanstveni članak
https://doi.org/10.32985/ijeces.17.9.3
A Hybrid Multi-Layered Joint Compression Encryption Scheme for RGB Images
Suha Abdul Raheem Khoja
; University of Baghdad, College of Engineering, Department of Electronics and Communication Jadriyah, Baghdad, Iraq
*
Zainab Noori Ghanim
; University of Baghdad, College of Engineering, Department of Electronics and Communication Jadriyah, Baghdad, Iraq
* Dopisni autor.
Sažetak
Robust security and bandwidth conservation are essential for digital image transmission in the modern digital era. In this study, a hybrid multi-layer joint lossy encryption-compression scheme for securing RGB colored images is proposed. In this scheme, 3D SPIHT (Set Partitioning in Hierarchical Trees) is used to exploit channel similarities that conventional 2D schemes miss by treating the color channels as a unified 3D data cube. Two joint stages are embedded in the 3D SPIHT. In the first stage, the 3D LL4 subband, obtained after 4 levels of DWT (discrete wavelet transform) decomposition, is followed by dynamic range optimization using the rooting companding transform, and then simultaneous diffusion and compression using the Chinese Remainder Theorem (CRT). In the second stage, a diverse scrambling strategy is applied to the four subband outputs of the first-level DWT decomposition, which are scrambled using 2D Henon, Arnold, Chirikov, and Logistic chaos systems. The 3D SPIHT stream output is then scrambled using a combination of DNA encoding and the 3D Lorenz system. Experimental results show a balance between security robustness and compression efficiency. The compressed file size is approximately 40% of the original, and the PSNR of the retrieved images exceeds 30 dB. The keyspace is significantly higher than the ideal value of 2100, providing protection against brute-force attacks, while multistage diffusion protects against differential and statistical attacks.
Ključne riječi
Chaotic Systems; CRT; DNA Coding; Joint Compression-Encryption; SPIHT;
Hrčak ID:
352138
URI
Datum izdavanja:
14.10.2026.
Posjeta: 0 *