Blind steganography based on 2D Haar transform

We propose and analyze experimentally a blind steganography method based on specific attributes of two dimensional discrete wavelet transform set by Haar mother wavelet. Steganography is the science that deals with hiding a secret message in unsuspicious cover media. The most recent steganographic techniques tend to hide a secret message in digital images. The blind steganography methods do not require an original image in the process of extraction what helps to keep a secret communication undetected to third party user or steganalysis tools. The secret message is encoded by Huffman code in order to achieve a better imperceptibility result. Moreover, this modification also increases the security of the hidden communication.