关键词: 信息安全, 保密通信, 信息隐藏, 离散余弦变换

Abstract:

Hiding the confidential information in the digital audio signal or file can achieve the effect of camouflage.That is an important approach to information security or secret communication.This paper designs a frequency domain insertion algorithm based on spectrum feature to hide information.It presents the outline process flow of this information hiding algorithm,details the insertion and extraction methods of frequency domain information and the experiment results of transparency,information capacity and robustness.Blind detection can be implemented by this algorithm.The experiments indicate it has good transparency and strong robustness against several kinds of attack with errorless transmission at certain bit rates.

Key words: information security;secret communication;information hiding;DCT