摘要
为了保护有价值的数字图像信息,提高信息的安全性,通过分析图像中每一个像素点的排列关系,提出了基于Z字形编码的数字图像加密算法。将原始图像化分成大小相同且不重叠的区域,对每个小区域按照Z字形编码的方式进行重新排列,从而得到一幅加密图像,解密时只需要对加密图像进行反Z字形编码即可以得到解密图像。最后论证了该算法的安全性与周期性。通过实例结果表明了该方法能够得到较好的加密效果,增强了数字图像的安全性。
In order to protect valuable data from undesirable reader,improve the security of information.By analysis the position of every pixel in digital image,an encryption algorithm based on Zigzag scan coding is proposed.First,the original digital image is divided into the same size region,and then the image is encrypted by transform every region according to the Zigzag scan coding.The encrypted image can by decrypted by the inverse Zigzag scan coding transformation.The security and periodicity of the proposed algorithm is discussed.The results indicate that the proposed algorithm get satisfying effect and improved the security of digital image.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第9期2145-2146,2159,共3页
Computer Engineering and Design
基金
国家973重点基础研究发展计划基金项目(2003CB716103)
关键词
信息隐藏
Z字形编码
置乱变换
周期性
信息安全
information hiding
zigzag scan
scrambling transformation
periodicity
information security
