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The word Steganography is derived from the word steganography of Greek language which means secured writing. It basically deals with the science of secret communication. The objective of steganography is to conceal the presence of the message from unapproved party. The present time secure image steganography exhibits a goal of exchanging the embedded information to the destination without being recognized by the attacker. Inverted Least Significant Bits (LSB) steganography is explained in this work. In this approach, the fundamental idea is of replacing the LSB of the cover image with the Bits of the messages to be hidden without destroying the property of the cover image fundamentally. This is one of the most challenging techniques because it is quite difficult to make a distinction between the stego-object and the cover-object if some LSB bits of the cover object are replaced. Generally, representation of 8 bits is used, subsequently 8 positions are accessible. Additionally, we have demonstrated that it is not important to put secret information at LSB only, the other bit positions can likewise be used to embed secret image. At some point it is conceivable to better PSNR at other bit positions.

Enhancement in PSNR using Inverted LSB Mechanism