In this paper we propose a new image steganography to meet an increasing demand for effective and cheap digital security scheme for the Internet. This technique is based on chaotic sequences in the discrete wavelet transform domain of covert images. Multiple sensitive images are added to a covert image as a white noise-like form. The results of theoretical analysis and computer simulation show the new hiding technique has improved properties with high security, imperceptibility and capacity for hidden information in comparison with LSB. Such properties can be exploited in the quest for secure communications and document exchange over the Internet.