Zero Distortion Technique: An approach to image steganography on color images using strength of Chaotic Sequence

Steganography is a powerful technique to hide data, i.e. the existence of the private and sensitive data cannot be pursued by the intruder. Combination of cryptography with steganography gives a powerful impact. It becomes a tedious task for the steganalyst to break the code. There are several techniques for performing steganography, out of which LSB is the widely used technique. Limitations of these techniques are like, it degrades the quality of the cover image, blurring, less amount of data can be hidden. Zero Distortion Technique has been proposed to overcome these limitations. Proposed technique consider the image only as a reference and hides data in the locations of the image. The bits of the cover image remains untouched which provides zero distortion in the cover image chaotic sequence is used to encrypt the elements of location matrix. Experimental results on certain color images gives better results in terms of amount of data which can be hidden i.e. in RGB bands. Proposed technique is efficient as there is no distortion in the cover image.