ABSTRACT: Steganography hides the existence of the data inside any cover file. There are different file formats used in steganography like text, image, audio and video. Out of these file formats image steganography is followed in this paper.One of the major objective of hiding data using image steganography is to hide the data in an image, so that the changes in the intensity of the colors of image must not be visible to, human eye. The focus of this paper is on spatial domain technique i.e. LSB technique of image steganography. Method used in the paper hides the data in combination of LSBs instead of hiding the data only in least significant one bit. Combination of bits used are LSB (1, 2) bits and (2, 3) bits. Results are compared qualitatively and quantitatively using parameters PSNR, MSE, BER, Entropy, Standard deviation. data from unauthorized users there is a need of hiding the data. There are various techniques of steganography of which image steganography technique is most useful. 2. Image Steganography An image is an array of M*N matrix. Each and every pixel has a numerical value which represents the color and light intensity of the pixel . Images are more popular cover files for transmission over the internet due to harmlessness and attraction. In image steganography, data is to be inserted into the cover image that gives the resultant stego-image [5, 6]
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