| 基于密钥图像的加密技术 |
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| 引用本文： | 冯兆艳,柴晓冬.基于密钥图像的加密技术[J].信息安全与通信保密,2005,32(10):88-90. |
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| 作者姓名： | 冯兆艳 柴晓冬 |
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| 作者单位： | 安徽大学电子科学与技术学院,安徽,合肥,230039 |
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| 摘 要： | 基于密钥图像的加密技术主要采用自然图像的傅立叶变换的相位作为密钥,并和另一幅图像的相位谱(phasespectrum)进行相加,实现图像加密。研究发现,用该密钥同时对两幅以上图像进行加密时,则用独立变量分析法可有效分离出密钥或原图像。本文提出一种相位调制(modulate0)方法,可有效保护密钥,确保加密图像的安全性。
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| 关 键 词： | 傅立叶变换 相位 独立变量分析 加密 |
| 修稿时间： | 2005年4月20日 |
Study of Encryption Techniques Secret Key Image Based |
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| Feng Zhaoyan,Cai Xiaodong.Study of Encryption Techniques Secret Key Image Based[J].China Information Security,2005,32(10):88-90. |
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| Authors: | Feng Zhaoyan Cai Xiaodong |
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| Institution: | Feng Zhaoyan Cai Xiaodong School of Electrical Science & Technology,Anhui University,Hefei in Anhui,230039 |
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| Abstract: | The encryption techniques Osecret key imageO based mainly uses nature image's phase of Fourier transformation as a key, adding up with another image's phase spectrum in order to achieve image encryption. During the study we found that if using the same secret key encrypts tow or even more images, the secret key or original images will be separated effectively by using Independent Component Analysis (ICA). In this paper, we proposed a method called phase modulation which can protect secret key effectively and insure the security of the image. |
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| Keywords: | Fourier transformation phase Independent Component Analysis (ICA) encryption |
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