摘要
密码学曾经作为信息加密的主要算法得到了广泛的应用.但随着计算机运算速度的大幅提高,基于密码学的信息加密已经不再安全,而基于信息隐藏技术的数据加密方法得到了迅速发展.本文研究了基于二维离散小波变换和密码学的信息隐藏算法,将签字信息经过编码后隐藏在小波变换的对角线区域,使得还原的图像影响小,可以应用在公文流转和数字水印中。
The password encryption has got extensive application, with the increase of the speed of the computer, encrypt on the basis of information of password has been no more safer already, and has been developed rapidly on the basis of the data encryption method of hiding technology of the information. This text research vary on the basis of 2D-DWT and information that password study hide arithmetic, encode to sign information hide in diagonal area of 2D-DWT, reduce the picture small to original picture influence, it can use in document currency and of the digital watermark.
出处
《黑龙江八一农垦大学学报》
2003年第3期97-100,共4页
journal of heilongjiang bayi agricultural university
关键词
信息隐藏
小波变换:信息编码
information hiding
wavelet transform
information encoding
