A Review Of Image Steganography Based On Discrete Wavelet Transform

Image steganography is considered as method hiding information and secret communication of potential computer users over the internet. From the past time to present time security of confidential information is always an important issue. The main purpose of stegnography is to hide the existence of the message so that it becomes difficult for attacker to detect it. The discrete wavelet transform is used to embed the secret into the cover image and the inverse transform is used to recover the secret. In this technique provides robustness, better image quality and authentication ability. The stress is laid to improve the authentication ability of the secret image.