Information hiding based on discrete time wavelet transform and huffman coding

Abstract EN

The approach of this paper presentation a companied technique for hiding secret messages (text) based on wavelet transform applying in cover image (a gray level image 8bit) then Huffman encoding is also executed on the secret messages, to increase the robustness of hiding system by inserting the embedded secret messages in the low frequency components of the cover image after applying wavelet transform followed by a sorting process and the coefficients of secret messages after applying Huffman encoding and using binary to multilevel to reading the string of message reducing by multiplying in attenuation factor before adding them with those of the cover image.

The experimental results show that the algorithm has a high capacity and a good invisibility, Moreover PSNR of stego image shows the better results the PSNR above 40 dB, the proposal system was activated according to attacker noise is addition and JPEG compression application are used without detection the secret-message.