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Title |
Role of watermarking in securing the Biometric Signature Database |
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Author |
Jyotika Chopra, Amod Kumar, Anupma Marwaha, Sanjay Marwaha |
| Citation |
Vol. 25 No. 11 pp. 93-98 |
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Abstract |
In this paper, a robust watermarking scheme is proposed for signature biometric. Conventional frequency domain algorithms use complex calculations but the proposed work avoids such calculations by using simple yet robust XOR operation. Experiments were done on freely available signature database as well as on standard images. Results show that the encrypted (proposed) watermark is invisible and secure with respect to various geometric operations such as rotation, dilation, Gaussian noise, alpha transparency and circular shift which may be attempted by the intruders. The proposed approach achieves large values of Peak Signal to Noise Ratio (PSNR) which ensures the watermark imperceptibility. High value of Number of Pixel Change Rate (NPCR) confirms the security. The proposed technique, thus, outperforms the existing methods and is resistant towards various attacks. |
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Keywords |
watermark, security; copyright; peak signal to noise ratio (PSNR); Number of pixel Change Rate (NPCR). |
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