By Ingemar Cox, Matthew Miller, Jeffrey Bloom, Mathew Miller
electronic watermarking is a key factor to copyright defense. It presents an answer to unlawful copying of electronic fabric and has many different priceless functions comparable to broadcast tracking and the recording of digital transactions. Now, for the 1st time, there's a ebook that focuses solely in this intriguing expertise. electronic Watermarking covers the an important study findings within the box: it explains the rules underlying electronic watermarking applied sciences, describes the necessities that experience given upward push to them, and discusses the various ends to which those applied sciences are being utilized. for that reason, extra basis is laid for destiny advancements during this box, aiding the reader comprehend and count on new ways and purposes. * Emphasizes the underlying watermarking ideas which are correct for all media: photos, video, and audio. * Discusses a wide selection of functions, theoretical ideas, detection and embedding thoughts and the foremost houses of electronic watermarks--robustness, constancy, info payload, and safety * Examines copyright security and plenty of different purposes, together with broadcast tracking, transaction monitoring, authentication, reproduction regulate, and equipment keep watch over. * offers a chain of specified examples referred to as "Investigations" that illustrate key watermarking options and practices. * comprises an appendix within the e-book and on the net containing the resource code for the examples. * features a entire thesaurus of watermarking terminology
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Additional info for Digital Watermarking
If a manufacturer were to forego the license, and just use DeCSS in their product, they would not be able to sell many devices before they were prosecuted for patent infringement. 1 APPLICATIONS 25 Legal, encrypted copy (encryption) Illegal, encrypted copy (encryption) Compliant player (playback control) (record control) Compliant recorder (record control) (encryption) Noncompliant player Noncompliant recorder Illegal, decrypted copy Fig. 4 Relationship between encryption and watermark-based copy control.
It was also about this time that watermarks began to be used as anticounterfeiting measures on money and other documents. The term watermark seems to have been coined near the end of the eighteenth century and may have been derived from the German term wassermarke  (though it could also be that the German word is derived from the English ). The term is actually a misnomer, in that water is not especially important in the creation of the mark. It was probably given because the marks resemble the effects of water on paper.
Digital signature technology has been applied to digital cameras by Friedman [88, 89], who suggests creating a “trustworthy camera” by computing a signature inside the camera. Only the camera would have the key required for creating the signature. Therefore, if we ﬁnd that a copy of an image matches its signature, we can be sure it is bit for bit identical with the original. These signatures are metadata that must be transmitted along with the Works they verify. It is thus easy to lose the signatures in normal usage.