基于混沌加密与自适应混合的数字图像隐藏技术

Digital Image Hiding Technology Based on Chaotic Encryption and Adaptive Blending

在分析信息加密传统方法的基础上,讨论利用变化了的Logistic系统,借助密码形成的初始参数对图像数据进行加密,混沌加密图像。论述了混合图像隐藏的一般方法,针对混合参数的选取这一难点提出了自适应混合算法。最后利用自适应混合图像的隐藏算法对加密图像信息进行了隐藏处理,实验证明这种算法简单、安全、鲁棒性好,而且克服了以往混合图像有隐藏轮廓显现的缺陷。

Based on the analysis of traditional information encryption methods, this paper first discusses image encryption by using changed Logistic system and then describes chaotic image encryption by means of the primary parameters formed by the password. General methods for hiding blended images are described, and an adaptive blending algorithm is put forward in allusion to the difficulty in the selection of blending parameters. Finally, hiding algorithm of adaptive blending image is used for hiding processing of the encrypted image information. Experiments show that this algorithm is simple, safe and robust, and eliminates the fault in which the confidential image outline always emerges on the resulting image.