一种高安全性的数字图像加密算法  

A Digital Image Encryption Algorithm of High Security

作　　者：刘星沙[1] 李敏[1] 费耀平[1] 

机构地区：[1]中南大学网络中心,湖南长沙410075

出　　处：《微电子学与计算机》2007年第2期21-23,27,共4页Microelectronics & Computer

基　　金：国家自然科学基金项目(90104025)

摘　　要：提出了一种新的高安全性的数字图像置乱加密算法。该算法变换过程中可以通过密钥进行控制,安全程度仅取决于密钥的长度,避免了Arnold等其它置乱加密算法安全性不高的缺点。该算法变换速度快,几次变换就可以达到很好的置乱效果,在信息隐藏和数字水印中有很大的实用价值。还给出了一种新的置乱程度的评价标准。In this paper, a new digital image encryption algorithm of high security is proposed. This algorithm overcomes the disadvantages of Arnold and else which is not security. The security of this algorithm is determined by the length of the key for it＇s transformation controlled by the key. Experimental results show that this algorithm has the advantages of fast transformation and easy inversion. It is only several times for this algorithm to get a good scrambling effect which has good practical value in information hiding and digital watermarking. A new method is proposed for estimating how is the digital image is scrambled.

关 键 词：图像置乱 加密 数字水印 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]