关键词: 数字密写, 人眼视觉系统, 离散小波变换

Abstract: Propose one kind of digital steganography algorithm based on Human Visual System（HVS） and Discrete Wavelet Transform（DWT）.Combine with the different characteristics from human eyes，the authors divide the secret information and embed them into the middle and high frequency subbands which in each R，G，B layer.The sequence according to the significance of subbands based on DWT from low to high.The results suggest the good invisibility can be achieved，and the hiding capacity of information is large.The new steganography algorithm based on the color image，solves the communication security problem of the information at Internet well.

Key words: steganography, Human Visual System（HVS）, Discrete Wavelet Transform（DWT）