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The digital data are transmitted using the Internet. So digital data must be secure, copyright protected, and authenticated at the same time. This paper proposes an algorithm to protect digital data by embedding watermark that is encrypted by DES algorithm. Two level discrete wavelet transformation (DWT) is applied to the original image. This ensure robustness of the proposed scheme. DES encryption to the watermark with a key and iterating operations ensure security of the watermark information. Encryption and decryption key is same for both the process. If we want to extract the watermark image, we must obtain the secret key. The experimental result shows that the watermark is robust against various attacks.

In this paper we are elaborating the concept of disease detection in the human body using the nail image of human fingers and analyzing the data from the image on the basis of nail color and texture. Fingernail has to be detected from the entire hand region using distribution density of the nail color pixels on the surface of nail. The methodology for creating a finger nail detection system involves removing the skin area from shiny/glossy nail portion; this is known as image segmentation concept that separates the specific object. Image segmentation is the method of dividing the image pixels into homogenous region.

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