摘要
数字签名是一种确保网络信息真实性的技术手段。首先探讨了基于杂凑函数(SHA)的数字签名算法DSA的实现,分析了图像DCT变换的频率特性。在此基础上提出了基于图像频域变换的隐藏签名方法,使签名传输的安全性、直观性得到有效解决,并提供多种签名验证手段。
Digital signature is a kind of technology instruments which insure the network information authenticity.The paper first discusses the implementation of DSA signature algorithm which is based on SHA and analyses the frequency characteristic of image DCT transform and.Then the paper provides the hiding signature method based on image trans-form of frequency domain.This method efficiently solves the security and directness of signature transmission.A few sig-nature authenticity instruments are also provided.
出处
《计算机工程与应用》
CSCD
北大核心
2003年第10期162-164,共3页
Computer Engineering and Applications
基金
河南省自然科学基金资助(编号:0111061100)
