The present paper proposes an asymmetric watermarking scheme suitable for fingerprinting and precision-critical applications. The method is based on linear algebra and is proved to be secure under projection attack. The problem of anonymous fingerprinting is also addressed, by allowing a client to get a watermarked image from a server without revealing her/his own identity. In particular, we consider the specific scenario where the client is a structured organization being trusted as a whole but involving possibly untrusted members. In such a context, where the watermarked copy can be made available to all members, but only authorized subgroups should be able to remove the watermark and recover a distortion-free image, a multilevel access to the embedding key is provided by applying Birkhoff polynomial interpolation. Extensive simulations demonstrate the robustness of the proposed method against standard image degradation operators.

A Multilevel Asymmetric Scheme for Digital Fingerprinting / Boato, Giulia; De Natale, Francesco G. B.; Fontanari, Claudio. - ELETTRONICO. - (2005), pp. 1-31.

A Multilevel Asymmetric Scheme for Digital Fingerprinting

Boato, Giulia;Fontanari, Claudio
2005-01-01

Abstract

The present paper proposes an asymmetric watermarking scheme suitable for fingerprinting and precision-critical applications. The method is based on linear algebra and is proved to be secure under projection attack. The problem of anonymous fingerprinting is also addressed, by allowing a client to get a watermarked image from a server without revealing her/his own identity. In particular, we consider the specific scenario where the client is a structured organization being trusted as a whole but involving possibly untrusted members. In such a context, where the watermarked copy can be made available to all members, but only authorized subgroups should be able to remove the watermark and recover a distortion-free image, a multilevel access to the embedding key is provided by applying Birkhoff polynomial interpolation. Extensive simulations demonstrate the robustness of the proposed method against standard image degradation operators.
2005
Trento
Università degli Studi di Trento - Dipartimento di Informatica e Telecomunicazioni
A Multilevel Asymmetric Scheme for Digital Fingerprinting / Boato, Giulia; De Natale, Francesco G. B.; Fontanari, Claudio. - ELETTRONICO. - (2005), pp. 1-31.
Boato, Giulia; De Natale, Francesco G. B.; Fontanari, Claudio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/358047
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