马步哈密顿圈(骑士巡游)在图像置乱加密方法上的应用
首发时间:2009-01-12
摘要:基于骑士巡游变换的置乱算法是目前图像加密方法研究的热点,它的密钥量大,安全性高,但传统日字形马步(1,2)的置乱只能隐藏图像的细节。为了克服此缺点,本文提出了基于骑士巡游变换的改进置乱算法。它包括1.基于骑士巡游类生矩阵的图像置乱方法,2,分块分层的置乱算法。3,将骑士巡游变换和Arnold变换结合的一种复合置乱算法。这些改进置乱算法,不但扩大了密钥库,还大大增强了置乱的效果。文中给出了这几种改进算法的实际应用效果。
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Image Scrambling Algorithms Based on Knight-tour Transform and its Applications
Abstract:The scrambling algorithm based on knight-tour transform is a hot topic because the number of its secret key is large and its security is high. But the classical knight-tour based on the movement of (1,2) can only scramble the details of digital image. This paper discusses the improved scrambling algorithms based on knight-tour transform to overcome the shortage. They include (1),Improved scrambling algorithms based on producing matrix. (2). A block multilayer scrambling algorithm (3). A composite scrambling algorithm which is made of knight-tour transform and Arnold transform. The results of experiment indicate that the image which are scrambled by these three methods can not only hide the large contour and edge but also enlarge the number of the secret keys
Keywords: Image Scrambling Algorithm knight-tour transform knight-tour
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