计算机工程 ›› 2011, Vol. 37 ›› Issue (20): 105-107.doi: 10.3969/j.issn.1000-3428.2011.20.037

• 安全技术 • 上一篇    下一篇

基于混沌加密的彩色图像盲数字水印算法

石红芹 a,吕方亮 a,刘遵雄 b   

  1. (华东交通大学 a. 软件学院;b. 信息工程学院,南昌 330013)
  • 收稿日期:2011-04-07 出版日期:2011-10-20 发布日期:2011-10-20
  • 作者简介:石红芹(1970-),女,讲师、硕士,主研方向:网络与信息安全,数字水印;吕方亮,工程师、硕士;刘遵雄,副教授、博士
  • 基金项目:
    国家自然科学基金资助项目(61065003);教育部人文社 会科学研究规划基金资助项目(09YJA630036);华东交通大学校立 科研基金资助项目(10RJ03)

Blind Digital Watermark Algorithm for Color Images Based on Chaotic Encryption

SHI Hong-qin a, LV Fang-liang a, LIU Zun-xiong b   

  1. (a. School of Software; b. School of Information Engineering, East China Jiaotong University, Nanchang 330013, China)
  • Received:2011-04-07 Online:2011-10-20 Published:2011-10-20

摘要: 针对单一混沌加密算法安全性较差的问题,提出一种基于扰动的二维混沌加密算法,利用二维Chebyshev映射和m-序列扰动作为混沌发生器,用于加密水印图像。将彩色载体图像绿色分量进行3级小波变换,提取其低频部分作为嵌入区域。将加密后的水印嵌入绿色分量的低频部分。实验结果表明,该算法计算速度较快,可以抵抗JPEG压缩、噪声、滤波等攻击,具有较好的数字水印特性。

关键词: 小波变换, 混沌加密, 盲数字水印, 质量因子, 图像置乱

Abstract: In order to increase the security of chaos-based encryption algorithm while not affecting the performance, a kind of encryption algorithm based on a two-dimensional Chebyshev maps with the combination of the m-sequence of the chaos is put forward. During the embedding of the watermark, discrete wavelet transform is done to the green luminance of RGB color space and low frequency part is extracted as the embedding field. The watermark is encrypted by using the compound chaotic sequence and is embedded into the low frequency part of the green luminance. Experimental results show that this watermark technique, in which the encrypting and embedding algorithms have less computational capacity, can resist JPEG compression, noise attack, filter and so on, as well as good digital watermark performance.

Key words: wavelet transform, chaotic encryption, blind digital watermark, quality factor, image scramble

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