摘要
对已有文献利用交叉熵进行图像置乱评价方法存在问题的基础上,进行了改进,通过引入图像分块信息,提出了更能真实反映图像置乱程度的方法。实验结果表明,改进方法可以有效的反映图像在不同加密算法下的置乱程度与加密次数的关系。
With the problem that exists in image scrambling evaluation method based on cross-entropy in published paper being pointed out,an improved method is proposed by introducing sub-block image information,the improved method can reflect the image scrambling degree more real.Experiment results show that the improved method can effectively reflect the relationship of image scrambling degree between different encryption algorithms and encryption times.
出处
《西安邮电学院学报》
2010年第1期106-109,共4页
Journal of Xi'an Institute of Posts and Telecommunications
关键词
图像加密
图像置乱
交叉熵
ARNOLD变换
image encryption
image scrambling
cross-entropy
Arnold transformation
