Information Security through an Improved Image Steganography Algorithm
Abstract
Steganography is the data hiding technique which allows hiding secret message or image within a larger image or message such that the hidden message or an image is undetectable. It is a very useful method for secret information transmission. This research proposed security of information through an image hiding steganographic method, of hiding an image within a cover image. This steganographic method aims to minimize the visually obvious and numerical differences between the cover image and a stego image with increase in the size of the payload. The proposed improved algorithm uses the binary codes which is the binary representation of pixels inside the image. This algorithm make use of improved least significant bit (LSB) technique, which is a popular technique in steganography ,in which least significant bits of cover are altered by secret data bits. The proposed method integrates randomization algorithm which improve the security of LSB scheme. The bits of the secret image are embedded in random pixels of the cover image. The method enhances the security of the LSB technique by randomly dispersing the bits of secret image in the cover image which makes it harder for unauthorized people to extract the original image. Since all the secret image bits are embedded in the cover image the exact secret image can be regenerated from the stego-image and thereby the image quality is preserved by the system. The research implements steganography for images, with an improvement in both security and image quality.
Keywords: Information security, Image, Steganography and Algorithm
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