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29 April 2002 Watermarking protocols for authentication and ownership protection based on timestamps and holograms
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Proceedings Volume 4675, Security and Watermarking of Multimedia Contents IV; (2002)
Event: Electronic Imaging, 2002, San Jose, California, United States
Digital watermarking has become an accepted technology for enabling multimedia protection schemes. One problem here is the security of these schemes. Without a suitable framework, watermarks can be replaced and manipulated. We discuss different protocols providing security against rightful ownership attacks and other fraud attempts. We compare the characteristics of existing protocols for different media like direct embedding or seed based and required attributes of the watermarking technology like robustness or payload. We introduce two new media independent protocol schemes for rightful ownership authentication. With the first scheme we ensure security of digital watermarks used for ownership protection with a combination of two watermarks: first watermark of the copyright holder and a second watermark from a Trusted Third Party (TTP). It is based on hologram embedding and the watermark consists of e.g. a company logo. As an example we use digital images and specify the properties of the embedded additional security information. We identify components necessary for the security protocol like timestamp, PKI and cryptographic algorithms. The second scheme is used for authentication. It is designed for invertible watermarking applications which require high data integrity. We combine digital signature schemes and digital watermarking to provide a public verifiable integrity. The original data can only be reproduced with a secret key. Both approaches provide solutions for copyright and authentication watermarking and are introduced for image data but can be easily adopted for video and audio data as well.
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Jana Dittmann, Martin Steinebach, and Lucilla Croce Ferri "Watermarking protocols for authentication and ownership protection based on timestamps and holograms", Proc. SPIE 4675, Security and Watermarking of Multimedia Contents IV, (29 April 2002);

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