26-12-2010, 10:21 AM
Image Steganography Technique Based on Wavelet Transform
In the technique of steganography, information is concealed in unremarkable cover media so as not to arouse an eavesdropper’s suspicion. It is widely used in the field of information security. The strengths and counter measures are
driven by weaknesses and vulnerabilities. There are easy to use communication channels for steganography. In this article, a modified high-capacity image steganography technique that depends on wavelet transform is described which has acceptable levels of imperceptibility and distortion in the image used as the carrier(cover image).
Steganography System
The encoding system’s secrecy is the key factor to the classical steganography system's secrecy. It is simple enough to expose the entire received media if a clue is given. The Modern steganographic system involves the use of a secret key and the embedded information is detectable only if the secret key is known. a cryptographic system’s security relies entirely on the key material. A comparison between the stego media and the cover immeadiately discloses the message and as a result, the the cover medium must be kept secret.
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