By Eric Diehl
Content material safeguard and electronic rights administration (DRM) are fields that obtain loads of realization: content material proprietors require structures that shield and maximize their sales; shoppers wish backwards compatibility, whereas they worry that content material vendors will secret agent on their viewing conduct; and lecturers are afraid that DRM could be a barrier to wisdom sharing. DRM applied sciences have a terrible popularity and aren't but trusted. This publication describes the main facets of content material defense and DRM structures, the target being to demystify the know-how and strategies. within the first a part of the booklet, the writer builds the rules, with sections that hide the explanation for shielding electronic video content material; video piracy; present toolboxes that hire cryptography, watermarking, tamper resistance, and rights expression languages; alternative ways to version video content material safeguard; and DRM. within the moment half, he describes the most current deployed suggestions, together with video ecosystems; how video is secure in broadcasting; descriptions of DRM platforms, comparable to Microsoft's DRM and Apple’s FairPlay; concepts for safeguarding prerecorded content material disbursed utilizing DVDs or Blu-ray; and destiny tools used to guard content material in the domestic community. the ultimate a part of the publication seems in the direction of destiny study subject matters, and the most important challenge of interoperability. whereas the booklet makes a speciality of holding video content material, the DRM rules and applied sciences defined also are used to guard many different different types of content material, similar to ebooks, files and video games. The booklet could be of worth to commercial researchers and engineers constructing comparable applied sciences, teachers and scholars in details protection, cryptography and media platforms, and engaged shoppers.
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Sample text
In 2003, a work-in-progress copy of ‘‘The Hulk’’ appeared on P2P networks two weeks before its theatrical release [90]. This work print was not the final version. Many special effects were missing. Color adjustments were not finalized. 7 With forensic marking, if the content were ever to be discovered in the public domain, for instance, on P2P file sharing networks, the embedded identifier could be extracted to identify the infringer [46]. This application requires the following characteristics: • Fast Embedding: At the duplication stage, there is a need to make numerous individual copies of the same piece of content, each one carrying a different identifier.
Nevertheless, it is less resistant to hostile adversaries. Thus, it may face some problems regarding non-repudiability in court. The commercial value of multimedia content protected by forensic marking is extremely high, especially for so-called screeners used before the official release. Thus, these pieces of content are attractive targets for organized pirates. Fortunately, the trust model of forensic marking is relatively strong. It assumes that the average pirate has access neither to the embedder nor to the detector.
Nevertheless, changing the key will allow us to safely continue using the watermark technology [82]. 3 Digital Watermarking 33 Fig. 5 Watermarking content ‘‘identical’’ to the original one, even if it experienced slight alterations. , watermark detection should be robust to transmission noise (Fig. 5). • Embedding rate accounts for the amount of data that can be embedded in a unit of content. It is, for instance, expressed in bits per second or bits per frame for video. Useful information is often smaller than the number of embedded bits due to the use of Error Correcting Codes (ECC) such as Reed-Solomon [83].