A New Technique for Protecting Confidential information Using Watermarking

A new approach of image watermarking based on RSA encryption technique for the lossless medical images has been proposed. This paper presents a strategy of attaining maximum embedding capacity in an image in a way that to determine the amount of information to be added in each pixel, maximum possible neighboring pixels are analyzed for their frequencies. The technique provides a seamless insertion of image into carrier video, and reduces the error assessment and artifacts insertion required to a minimal. Two or more bits in each pixel can be used to embed message, which has high risk of delectability and image degradation to increase the embedding capacity. The RSA techniques might use a significant bit insertion scheme, the bits of data added in each pixel remains constant or a variable least significant bit insertion in which the number of bits added in each pixel vary on the surrounding pixels to avoid degrading the image fidelity.