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Abstract-Telemedicine is well known application where enormous amount of medical data need to be transferred securely over network and manipulate effectively. Security of digital data, especially medical images, becomes important for many reasons such as confidentiality, authentication and integrity. Digital watermarking has emerged as a advanced technology to enhance the security of digital images. The insertion of watermark in medical images can authenticate it and guarantee its integrity. The watermark must be generally hidden does not affect the quality of the medical image. In this paper, we propose blind watermarking based on Discrete Wavelet Transform (DWT), Discrete Cosine Transform (DCT) and Singular Value Decomposition (SVD), we compare the performance of this technique with watermarking based DWT and SVD. The proposed method DWT, DCT and SVD comparatively better than DWT and SVD method.

Today, the world is going to be digitalized in all the ways. Every business units, government and private sectors, research units are using the digital image as transferring mode for every critical data. These images over the internet which will not be secure. Therefore there is a need of image security. Currently, there exists various image security techniques like encryption, watermarking, steganography, etc. This paper discusses the basic image security techniques, the survey of the recent research in the field of image securities like ANN Based Approach, Genetic Algorithm Based Approach, DCT based approach, chaos-based approach, SVD based approach, Steganographic based approach, DWT based approach, visual cryptography based approach, watermarking based approach. The paper provides the future scope of image security.

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