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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Multilevel Semi-fragile Watermarking Technique for Improving Biometric Fingerprint System Security
verfasst von : M. V. Joshi, Vaibhav B. Joshi, Mehul S. Raval
Erschienen in: Intelligent Interactive Technologies and Multimedia
Verlag: Springer Berlin Heidelberg
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Classical biometric system are prone to compromise at several points. Two of the vulnerable points are : 1. biometric database 2. biometric feature matcher subsystem. We propose a two level watermarking scheme to secure these vulnerable points. Watermark W
1
is used for database authentication and made resistive to lossy compression. It is derived using block based singular values (SV’s) of a fingerprint image. W
1
establish linkages between watermark and fingerprint image. Watermark W
2
is used to secure feature matcher subsystem. It is computed using second and third order moments of the fingerprint image. W
2
is made resistive to mild affine transformation and lossy compression to incorporate practical aspects of biometric fingerprint system. The proposed watermarking method not only provides protection to database and matcher subsystem, it also gives security against copy attack.