LSB Based Image Steganography With The Aid of Secret Key and Enhance its Capacity via Reducing Bit String Length

Abstract

Data hiding is an approach in which one can transmit the information to the exact user without notice to third person. Nowadays, the all information is available across the web has easily accessible, so it is necessary to improve the security mechanism. Steganography is the technology which uses images to conceal the information inside them. To unleash a secure transmission Steganography make latent the existence of information into images. In this paper image steganography by the use of secrete key is demonstrated. The information has been made latent in LSB of RGB true color Image. To avoid unintended access from illegal user the Secret information resides within LSB of image where a secret key protects the information. In LSB Technique, at a peculiar position of LSB of the image the Secret information is stacked. In this proposed technique, a message bits stream has been reduced from each character having seven bits in ASCII to each character having five bits stream. In conclusion of the results, the capacity of image is increases up to 30% and it can improves Peak Signal to Noise ratio up to 27% compared to the existing technique.