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Nair, Jayashree
- Secure Watermarking using Diophantine Equations for Authentication and Recovery
Abstract Views :206 |
PDF Views:0
Authors
Jayashree Nair
1,
T. Padma
2
Affiliations
1 Acharya Institute of Management & Sciences, Peenya, Bangalore, Karnataka, IN
2 Sona College of Engineering, Salem, Tamil Nadu, IN
1 Acharya Institute of Management & Sciences, Peenya, Bangalore, Karnataka, IN
2 Sona College of Engineering, Salem, Tamil Nadu, IN
Source
Journal of Network and Information Security, Vol 3, No 2 (2015), Pagination: 1-9Abstract
This paper describes an authentication scheme that uses Diophantine equations based generation of the secret locations to embed the authentication and recovery watermark in the DWT sub-bands. The security lies in the difficulty of finding a solution to the Diophantine equation. The scheme uses the content invariant features of the image as a selfauthenticating watermark and a quantized down sampled approximation of the original image as a recovery watermark for visual authentication, both embedded securely using secret locations generated from solution of the Diophantine equations formed from the PQ sequences. The scheme is mildly robust to Jpeg compression and highly robust to Jpeg2000 compression. The scheme also ensures highly imperceptible watermarked images as the spatio - frequency properties of DWT are utilized to embed the dual watermarks.Keywords
Diophantine Equations, Content Authentication, Authentication Watermark, Recovery Watermark, PQ Vector, DWT.
- Performance Analysis of a Novel Image Content Authentication Scheme Using Multiple Watermarks in Dual Domains
Abstract Views :243 |
PDF Views:148
Authors
Jayashree Nair
1,
T. Padma
2
Affiliations
1 AIMS Institutes, Bangalore, IN
2 Sona College of Technology, Salem, IN
1 AIMS Institutes, Bangalore, IN
2 Sona College of Technology, Salem, IN
Source
Adarsh Journal of Information Technology, Vol 5, No 2 (2016), Pagination: 10-16Abstract
This paper presents a multiple watermark based semi-fragile watermarking scheme that tries to balance the requirements of an effective authentication scheme ensuring imperceptibility, tamper detection and localization of tampered areas. The proposed scheme uses multiple watermarks to enable authentication at multiple levels in the wavelet domain. The scheme is flexible and permits the user to decide on the number of watermarks to be embedded based on the nature of the application. It can also accurately locate the tampered locations.Keywords
Content Authentication, Authentication Watermark, Recovery Watermark, DWT, Tamper Localization, Robustness, Feature Vector.Full Text
References
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