TITLE:
Novel Scheme for Compressed Image Authentication Using LSB Watermarking and EMRC6 Encryption
AUTHORS:
S. J. Jereesha Mary, C. Seldev Christopher, S. Sebastin Antony Joe
KEYWORDS:
Watermark, EMRC6, LSB, Content Authentication, Encryption
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.8,
June
17,
2016
ABSTRACT: 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.