ABSTRACT
Steganography is the science and art of secret communication between two sides that attempt to hide the content of the message. It is the science of embedding information into the cover image without causing a loss in the cover image after embedding. Steganography is the art and technology of writing hidden messages in such a manner that no person, apart from the sender and supposed recipient, suspects the lifestyles of the message. It is gaining huge attention these days as it does now not attract attention to its information's existence. Spread spectrum is the technique of modulating a narrow band signal with a wideband signal so that the energy of the resultant signal is spread evenly across a wider spectrum and therefore hard to detect. Spread Spectrum Image Steganography (SSIS) typically modulates the binary message signal into a noise signal and the result is added to an image. This resultant signal is similar to noise. By carefully adjusting the power of the embedded signal it is possible to achieve both imperceptibility of the hidden message and reasonable recovery of the signal. The stego-images produced by SSIS will be indistinguishable from images corrupted by noise. An error correcting code is incorporated into the embedding so that the errors in signal recovery can be corrected.
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