A Multilevel Asymmetric Scheme for Digital Fingerprinting

Boato, Giulia and De Natale, Francesco G.B. and Fontanari, Claudio (2005) A Multilevel Asymmetric Scheme for Digital Fingerprinting. UNSPECIFIED. (Submitted)

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    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.

    Item Type: Departmental Technical Report
    Department or Research center: Information Engineering and Computer Science
    Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7885 Computer Engineering
    T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5105.5 Computer Networks
    T Technology > TA Engineering (General). Civil engineering (General) > TA329 Engineering mathematics
    Report Number: DIT-05-068
    Repository staff approval on: 29 Nov 2005

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