TY  - JOUR
T1  - A New Hybrid Image Encryption Model Based on Custom Logic Functions and Dynamic Chaotic Keys
AU  - Khalil, Adil
AU  - Al Imam, Adel
PY  - 2025
DA  - December
Y2  - 2025
DO  - 10.35377/saucis...1749483
JF  - Sakarya University Journal of Computer and Information Sciences
JO  - SAUCIS
PB  - Sakarya University
WT  - DergiPark
SN  - 2636-8129
SP  - 762
EP  - 772
VL  - 8
IS  - 4
LA  - en
AB  - Any secure image encryption system needs to distort the statistical and visual structure of the image to prevent unauthorized access. Unlike traditional chaos-XOR methods, this paper presents a new hybrid image encryption model based on dynamic chaotic key generation, combined with two novel dedicated bit-level logic functions. The proposed model includes image pre-processing steps, such as flattening color channels and pixel shuffling, to break down the spatial structure. Bit-level nonlinear transformations are then applied using dedicated bit-level logic functions (FLF and FOF). The Bogdanov scheme was used as the chaotic key generator.  The image encryption quality was evaluated against four state-of-the-art models using Entropy, NPCR, UACI, PSNR, and SSIM, along with visual analysis of histograms and correlation indices. The experimental results reported an average Entropy value of 7.95. NPCR rate and UACI values were 99.61% and 33.2% respectively. The correlation coefficient was 0.0046. The SSIM remained at 1.0, while the average encryption execution was 0.47 seconds. These results demonstrate that the proposed system can achieve a high level of visual security. This study represents a qualitative and quantitative contribution to the development of secure digital image processing methods.
KW  - Image Processing
KW  - Bogdanov Scheme
KW  - FLF
KW  - FOF
KW  - Chaotic Key
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UR  - https://doi.org/10.35377/saucis...1749483
L1  - https://dergipark.org.tr/en/download/article-file/5084854
ER  -