Lec49 50 digital rights management

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2. DIGITAL RIGHTS MANAGEMENT DRM technologies attempt to control use of digital media by preventing access, copying or conversion to other formats by end users. The advent of digital media and analog/digital conversion technologies, especially those that are usable on mass-market general-purpose personal computers, has vastly increased the concerns of copyright-dependent individuals and organizations, especially within the music and movie industries, because these individuals and organizations are partly or wholly dependent on the revenue generated from such works. 3. While analog media inevitably loses quality with each copy generation, and in some cases even during normal use, digital media files may be duplicated an unlimited number of times with no degradation in the quality of subsequent copies. The advent of personal computers as household appliances has made it convenient for consumers to convert media, this combined with the Internet and popular file sharing tools, has made unauthorized distribution of copies of copyrighted digital media (so-called digital piracy) much easier. 4. DRM is most commonly used by the entertainment industry (e.g., film and recording). Many online music stores, such as Apple Inc.'s iTunes Store, as well as many e-book publishers have implemented DRM. In recent years, a number of television producers have implemented DRM on consumer electronic devices to control access to the freely-broadcast content of their shows, in response to the rising popularity of time-shifting digital video recorder systems such as TiVo. 5. Goal DRM must balance prevention of copyright violation while at the same time allow fair use 6. Copyright Does Not Protect: 1. Works not fixed in a tangible form (Often things that need to be protected are not in a tangible form) Ideas, procedures, methods, processes, systems, principles, discoveries, etc. 2. Work composed solely of common property with no transformative value 7. Fair Use Legal use of copyrighted works for education, research, reporting, etc. must provide transformative value Determined by four factors purpose and character of the use nature of the copyrighted work amount of the copyrighted work used effect on market value of copyrighted work 8. Examples of Fair Use Citing short passages of a book for a term paper Making a backup copy of a CD for personal use Song parodies 9. Digital Rights Management Mission: protect rights of digital media producers while enabling access for fair use grant exclusive rights in exchange for disclosure Reality: DRM is just protection technology, and is fast eroding our rights of fair use may never be able to reuse parts of any digital content (documents, film, images, audio, etc.) hinders progress of science and the useful arts 10. Protection Technology Any technology designed to prohibit access to a copyrighted work e.g., algorithms for content encryption Protects rights of the author, but prohibits fair use prohibits public access never expires 11. Digital Millennium Copyright Act Illegal to develop or distribute any mechanism to circumvent protections e.g., demonstrating weaknesses in encryption algorithms or posting algorithm to a website Education and research on DRM may become dormant for fear of lawsuits allowed only via exceptions to the DMCA 12. Research Paradox Develop more sophisticated methods to encrypt digital media content Erodes our rights to use digital media 13. Discussion What is your experience with DRM? Do you think keeping in mind todays evolving digital life style that digital piracy can be controlled?