De-Noise Steganography by Enhancing the Cover
Image: A Multi-Level Security Approach
Jithesh Korothan1, S.B Kishor2
, and Pradeep Kumar3
1Department of Computer Science, Mahatma Gandhi College, India.
2Department
of Computer Science, Sardar Patel Mahavidyalaya, India.
3Department
of Computer Science, Kamala Nehru College, India.
Abstract: A technique that combines both logic and craft
only can survive long. A multi-level security mechanism by blending
steganogrpahy and visual cryptography is proposed here. Hiding already
encrypted data inside an image is of immense value. Encryption is done by
visual cryptography and hiding is done through the proposed de-noise Steganography
With Selected Noise Bit Replacement Technique (SNBR). By and large, hiding data
inside an image makes distortion to the image that leads to suspicions.
Instead, this technique tries to remove disturbance or noise that is already
present in the image and enhances the cover image through replacing noise bits
present in the cover image with secret. In view of the fact that we replace the
noise bits with the secret, it improves the quality of the cover medium and
consequently the cover seems innocuous. As a result it reduces the chance of
steg-analysis. The proposed method called SNBR, uses a location map to
guarantee the correct extraction of the secret data. The goal of this study is
to avoid degradation of the cover and improve the confidentiality of the
information being communicated. Experimental results show that the new method
achieves good security and a higher peak signal to noise ratio for the same
number of bits per pixel of embedded image.
Keywords: Cover, de-noise,
steganography, selected noise bit, stego-key, visual cryptography.
Received May 5, 2014; accepted December 23,2014