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首页> 外文期刊>Microsystem technologies >Various dimensional colour image encryption based on non-overlapping block-level diffusion operation
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Various dimensional colour image encryption based on non-overlapping block-level diffusion operation

机译：基于非重叠块级扩散操作的各种尺寸彩色图像加密

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摘要

This paper proposes a colour image encryption scheme to encrypt colour images of arbitrary sizes. In this scheme, a fixed block size (3 x 8) based block-level diffusion operation is performed to encrypt arbitrary sized images. The proposed technique overcomes the limitation of performing block-level diffusion operations in arbitrary sized images. This method first performs bit-plane decomposition and concatenation operation on the three components (blue, green, and red) of the colour image. Second it performs row and column shuffling operation using the Logistic-Sine System. Then the proposed scheme executes block division and fixed block-level diffusion (exclusive-OR) operation using the key image generated by the Piece-wise Linear Chaotic Map. At last, the cipher image is generated by combining the diffused blocks. In addition, the SHA-256 hashing on plain image is used to make chaotic sequences unique in each encryption process and to protect the ciphertext against the known-plaintext attack and the chosen-plaintext attack. Simulation results and various parameter analysis demonstrate the algorithm's best performance in image encryption and various common attacks.
机译：本文提出了一种彩色图像加密方案来加密任意尺寸的彩色图像。在该方案中，执行基于固定的块大小（3×8）的基于块级扩散操作以加密任意尺寸的图像。所提出的技术克服了在任意尺寸的图像中执行块级扩散操作的限制。该方法首先在彩色图像的三个组件（蓝色，绿色和红色）上执行位平面分解和串联操作。其次，它使用Logistic-Sine系统执行行和列Shuffling操作。然后，所提出的方案使用由直明线性混沌映射映射产生的密钥图像执行块分割和固定块级扩散（独占块或）操作。最后，通过组合漫反射块来生成密码图像。此外，普通图像上的SHA-256散列用于在每个加密过程中进行混沌序列，并保护密文免受已知纯文本攻击和所选纯攻击的密文。仿真结果与各种参数分析展示了算法在图像加密和各种常见攻击中的最佳性能。

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