基于Logistic映射与LWT的音频隐写算法

提出了一种基于Logistic序列置乱与小波提升的高层LSB音频隐藏算法。为了增加传输过程的安全性，在前端用Logistic混沌序列对秘密语音进行扰乱。针对传统的LSB鲁棒性差的问题，提出了将秘密语音的小波系数嵌入载体小波系数的第9～12位的算法，该算法的隐藏量为载体语音容量的25％。通过仿真实验证明，该算法透明性好，且可以实现盲提取，将含密载体通过QQ传输之后也可以正确提取秘密语音。

A Novel Audio Steganographic Algorithm Based on Logistic Map and Lifting Wavelet Transformation

A novel high-layer LSB audio steganographic algorithm based on logistic sequence scrambling and wavelet lifting is pro-posed.Firstly,Logistic chaos sequence is used to scramble secret signal in the front end to improve security in the transmitting process;secondly,in order to increase robustness of traditional LSB,an algorithm is proposed,which embeds the wavelet coefficients of secret signal into the wavelet coefficients of carrier signal’s ninth-to-twelfth bits.Hidden amount of the proposed method is up to 25 percent of the capacity of carrier signal.The simulation results show that the algorithm has good transparency and can extract secret signal blindly, besides,secret signals can be extracted correctly through QQ transmission.