Abstrait

IMAGE STEGANOGRAPHY BASED ON POLYNOMIAL FUNCTIONS

Ms.Soniya Vijayakumar

Steganography hides the text message in the bytes of the cover medium, which is the container, used to hide the message. Currently most of the steganography algorithms work by modifying the Least Significant Bit (LSB) of the consecutive bytes of the cover medium to store the secret data. The main drawback of this algorithm is that hidden message can be retrieved easily through steganalysis since the messages are stored in consecutive bytes. In this paper, two novel methods for selecting the bytes of the cover medium in which the secret data bits to be stored are proposed. In both methods, the byte of the cover medium where the secret data is to be stored is selected randomly. The first method is based on a linear polynomial function and the second method is based on a quadratic polynomial function. The present work compares the efficiency of the two methodologies.