| 基于广义Feistel结构的分组图像加密算法 |
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| 引用本文： | 方鹏飞,吴成茂.基于广义Feistel结构的分组图像加密算法[J].安康学院学报,2013(3):20-25. |
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| 作者姓名： | 方鹏飞 吴成茂 |
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| 作者单位： | 西安邮电大学电子工程学院,陕西西安710121 |
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| 基金项目： | 国家自然科学基金项目（61073106）; 中国人民解放军总装备部武器装备预研项目（9140A25030411HK339）; 陕西省教育厅自然科学基金项目（2010JK816） |
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| 摘 要： | 为了提高加密信息的安全性等要求,提出了一种广义拟feistel结构分组加密算法。首先利用三角混沌映射产生混沌序列并将明文分块,然后将三角混沌映射和灰度扩散机制相结合依次对明文进行替换,最后将三角混沌作为密钥用于广义拟feistel结构分组加密算法对替换后的明文加密。通过对加密后图像相邻像素所对应的共生矩阵特性分析表明,加密图像具有良好的空间随机均匀分布特性。
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| 关 键 词： | 三角混沌 分组加密 拟feistel结构 共生矩阵 图像加密 |
Adaptive Block Image Encryption Algorithms Based on Generalized Feistel Structure |
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| FANG Pengfei,WU Chengmao.Adaptive Block Image Encryption Algorithms Based on Generalized Feistel Structure[J].Journal of Ankang Teachers College,2013(3):20-25. |
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| Authors: | FANG Pengfei WU Chengmao |
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| Institution: | (School of Electronic Engineering,Xi＇an University of Posts and Telecommunications,Xi＇an 710121,Shaanxi,China) |
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| Abstract: | In order to improve the security of the image encryption algorithms,the generalized quasi-feistel structure block cipher algorithm for image encryption is proposed.Firstly,the triangular chaotic sequence generated by triangular chaotic map and plaintext is segmented into four equal sub-blocks.Secondly,the triangle chaotic map combined with gray-scale diffusion mechanism is used to replace the gray values of plaintext.Lastly,the improved encryption algorithm based on quasi-feistel structure and triangle chaotic sequence is applied to realize the encryption of the replaced plaintext.Analyzing the encrypted image by means of gray level co-occurrence matrix（GLCM）,it shows that the neighborhood pixels of encrypted image has good performance of space random uniform distribution. |
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| Keywords: | Triangle Chaos block cipher Quasi-feistel structure co-occurrence matrix Image Encryption |
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