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A novel universal hybrid chaotic image encryption algorithm using block-based dynamic stack confusion
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DOI：10.1016/j.eswa.2026.133287.png)
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Abstract
En 中文
As the transmission of image data in open networks becomes increasingly frequent, image encryption is essential for Internet-based storage and transmission. To ensure its security, this paper proposes a universal image encryption scheme based on the two-dimensional Sine-H & eacute;non chaotic system (2D-SHCS) and the one-dimensional Logistic-Sine-Exponential chaotic system (1D-LSECS). A Dynamic Image-Time Chaotic Key Generation (DITC-KeyGen) mechanism was designed to achieve non-repeating key streams. A three-stage diffusion-confusion-confusion cascaded architecture is adopted: The diffusion performs global pixel perturbation using pseudorandom sequences; The first round of confusion employs a hierarchical circular shift strategy to break the spatial correlation; The second confusion stage introduces a block-based dynamic stack strategy, driven by dual chaotic sequences for adaptive pixel push/pop operations. Results show uniform pixel distribution (average chi(2) approximate to 255), information entropy of 7.99, adjacent pixel correlation coefficients approaching zero, Number of Pixels Change Rate (NPCR) and Unified Average Changing Intensity (UACI) values close to theoretical ideals, a key space of 2771, a NIST randomness test pass rate of no less than 99.49%, and encryption times of 0.16 s (256x256 grayscale), 1.60 s (512x512 color), and 2.13 s (1024x1024 grayscale). Security analysis and performance tests confirm that the scheme effectively resists statistical, differential, brute-force, and chosen-plaintext attacks, while demonstrating strong robustness against cropping attacks.
Keywords:
New chaotic maps
Image encryption
Block-based dynamic stack confusion
Image security
Chaotic performance evaluation
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7.5
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3.0W
Citations:
10.2W
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