基于相关检测的信息隐藏算法  

A DATA-HIDING ALGORITHM BASED ON CORRELATION DETECTION

作　　者：周武艺[1] 武金木[1] 刘茂华[1] 

机构地区：[1]河北工业大学计算机科学与软件学院,天津300130

出　　处：《计算机应用与软件》2007年第9期184-186,共3页Computer Applications and Software

摘　　要：针对公用网络上传输的重要信息面临诸多的安全威胁,提出了一种基于相关检测的信息隐藏算法,利用与已知模板的正、负相关来对待隐藏信息比特位进行扩频调制,再根据调制后的序列,调整载体信号的小波变换域细节分量的系数以嵌入信息。考虑到隐藏信息的长度是变化的,算法中定义了隐藏信息检测的结束标志,提高了算法的效率;同时该算法隐藏文本信息时仍具一定的抗噪声干扰能力,降低了信息提取时的误码率,且算法隐藏的信息容量较高,能够实现公用网上通过多媒体载体进行重要信息隐蔽高效传输的目的。To reduce the threat to the security of important information on public network, a kind of data-hiding algorithm based on correlation detection is presented. The algorithm can obtain new sequence by spreading spectrum from every bit according to the positive or negative correlation to known module, and adjust the sub-vectors coefficient of wavelet conversion according to the new sequence to hide data. Considering the variable data size, the algorithm defines a kind of sign to end the data-extracting process, which advances the algorithmic efficiency. The algorithm shows resistance to noise while it hides text data, which can depress the misinformation probability. The capacity of data-hiding is strong so that the algorithm transmit important imformation efficiently by hidding them in a multimedia signal on public network.

关 键 词：信息隐藏 扩频 小波变换 相关 算法 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]