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Novel Scheme for Compressed Image Authentication Using LSB Watermarking and emrc6 Encryption

Circuits and Systems 2016年第8期7卷 1722-1733页

作者： S. J. Jereesha Mary C. Seldev Christopher S. Sebastin Antony Joe Faculty of EE Anna University Chennai India Department of CSE St. Xavier’s Catholic College of Engineering Nagercoil India Faculty of I&C Anna University Chennai India

In the current era, transmission and storing of medical data in the digital form is of great concern and thus the requirement for content authentication has aroused. As a solution to these, digital watermarking techniques and encryption schemes have been used to secure medical data like medical images. In this paper a combination of two algorithms to provide image authentication for medical images in the compressed format is proposed. In the proposed method, the watermark image is encrypted using the Enhanced modified RC6 block cipher (emrc6) algorithm and the encrypted watermark image is watermarked using the simple Least significant Bit (LSB) watermarking technique. The watermarked output image shows no visual imparity and the watermark which has been extracted has no visual difference. The test results show that the watermarked image has high quality and the watermark is very secure. Also the PSNR value of proposed method is 44.966 on an average and 43.0633 for the existing system where LSB technique is integrated with MRC6 for security of watermark. Hence the work is aimed to increase the embedding volume and make the watermark more secure which is the basic requirement of medical image security.

关键词： Watermark emrc6 LSB Content Authentication Encryption

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