A Hybrid Secure watermarking technique in Telemedicine

Abstract

Abstract-For healthcare applications, a hybrid multiple watermarking has been projected in this paper. For authentication and identity purpose, the projected scheme makes use of two watermarks, one in the form of text watermark which includes diagnostic information of the patient and the other image watermark includes the hospital logo. In order to improve the robustness performance of the scheme DWT, DCT and SVD is applied while inserting the multiple watermarks to reduce the noise effects on the watermarked image. The security of the text and image watermark is enhanced by using Arithmetic coding and Arnold transform respectively before inserting into the original medical image. Various experiments have been carried out on different medical imaging modalities to estimate the performance of the projected scheme in terms of imperceptibility, robustness and security even after different types of attacks. Keyword -Discrete wavelet transforms, Discrete cosine transform, Singular value decomposition, Authentication, Telemedicine.I. INTRODUCTION Telemedicine eradicates distance barrier and affords entrée to medical services obtainable at far-away places. It permits transmission of medical data from one position to another and facilitates handy and accurate interfaces among patients and medical staff. Circulation of medical images enforces significant prerequisite that the medical images were not adapted by illegal users. This precondition is called preserving integrity of medical images. On the contrary, transmission of medical image and patient data autonomously through commercial networks guides to more cost and transmission time [1]. Watermarking is employed to deal with the above two concerns. Digital watermarking is the current, admired and competent scheme for the safety of multimedia data. In this scheme watermark is embedded into the digital data to protect it from unauthorized use. Digital watermarking has diverse applications such as copyright protection, copy protection, tamper detection, broadcast monitoring, content archiving, fingerprinting, healthcare, cyber watermarking, digital cinema and content authentication. Medical image watermarking has various benefits such as accumulation of storage space and bandwidth necessities, privacy of patient data [2,3]. Additionally, medical image watermarking also assists in reducing medical identity thefts which are the serious safety issues reported in a variety of investigations [2,3,4]. The major anxiety of digital image watermarking schemes is that the watermark should not influence the visual quality of the original medical image and it should be robust towards dissimilar signal processing attacks.Based on the domain used for hiding data within an image, watermarking techniques are organized into two categories, namely, spatial domain and frequency domain. Information is straightforwardly inserted into original image in spatial domain watermarking techniques [5][6][7][8]. In frequency domain techniques [9][10][11], information is inserted into transformed orig...