A chaos-based joint image compression and encryption scheme using DCT and SHA-1
A chaos-based joint image compression and encryption scheme using DCT and SHA-1
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DOI：
10.1016/j.asoc.2011.05.050
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发表时间：
2011-12-01
影响因子：
8.7
通讯作者：
Wong, Kwok-Wo
中科院分区：
文献类型：
--
作者：
Yuen, Ching-Hung;Wong, Kwok-Wo
提出了一种基于混沌的离散余弦变换（DCT）和安全散列算法-1（SHA-1）的联合图像压缩加密算法。由于SHA-1是快速和输入敏感的，它被用来增强对图像像素的扩散效果。将整幅图像的DCT系数分成两个序列，相互作用。低频系数序列与密钥一起生成消息摘要，以扰动由高频系数组成的另一个序列。高频序列的最后一个密码块作为反馈，控制低频序列中的扩散和置换。选择霍夫曼码作为熵编码对加密链进行压缩。实验结果表明，该算法是有效的和高度敏感的密钥和平原图像。(C)2011年爱思唯尔B。V.保留所有权利。
A chaos-based joint image compression and encryption algorithm using discrete cosine transformation (DCT) and Secure Hash Algorithm-1 (SHA-1) is proposed. As SHA-1 is fast and input-sensitive, it is employed to enhance the diffusion effect on image pixels. The DCT coefficients of the whole image are separated into two sequences for mutual interaction. The sequence of low-frequency coefficients, together with the secret keys, generates a message digest to perturb another sequence composed of high-frequency coefficients. The last cipher block of the high-frequency sequence is used as a feedback to control the diffusion and permutation in the low-frequency sequence. Huffman code is chosen as the entropy coding to compress the encrypted chains. Experimental results confirm that our algorithm is efficient and highly sensitive to both the key and the plain-image. (C) 2011 Elsevier B. V. All rights reserved.