source of reference: Protected Media Path (The Free Encyclopedia WikipediA) last edited on 5 July 2018, at 20:32 UTC, URL: https://en.wikipedia.org/
The Protected Media Path is a set of technologies creating a "Protected Environment," first included in Microsoft's Windows Vista operating system, that is used to enforce digital rights management (or DRM) protections on content. Its subsets are Protected Video Path (PVP) and Protected User Mode Audio (PUMA). Any application that uses Protected Media Path in Windows uses Media Foundation...
[Overview] The protected environment in which DRM content is played contains the media components that play DRM content, so the application only needs to provide remote control (play, rewind, pause, and so on), rather than having to handle unprotected content data. The protected environment also provides all the necessary support for Microsoft-approved (signed) third-party software modules to be added. It provides a "wall" against outside copying, where within the walls, content can be processed without making the content available to unapproved software...
source of reference: Secure Digital Music Initiative (The Free Encyclopedia WikipediA) last edited on 30 December 2023, at 22:51 UTC, URL: https://en.wikipedia.org/
Secure Digital Music Initiative (SDMI) was a forum formed in late 1998,composed of more than 200 IT, consumer electronics, security technology, ISP and recording industry companies, as well as authors, composers and publishing rightsholders (represented by CISAC and BIEM representatives, mainly from SGAE/SDAE (Gonzalo Mora Velarde and José Manuel Macarro), GEMA (Alexander Wolf und Thomas Kummer-Hardt), SACEM/SDRM (Aline Jelen, Catherine Champarnaud, Laurent Lemasson), MCPS/PRS (Mark Isherwood), ASCAP , BMI (Edward Oshanani), and SODRAC), ostensibly with the purpose of developing technology and rights management systems specifications that will protect once developed and installed, the playing, storing, distributing and performing of digital music. ...
[Method] The strategy for the SDMI group involved two stages. The first was to implement a secure digital watermarking scheme. This would allow music to be tagged with a secure watermark that was hard to remove from the source audio without damaging it. The second was to ensure that SDMI-compliant players would not play SDMI tagged music that was not authorized for that device. The reasoning was that even if the files were distributed they could not be played as the device would detect the music was not authorized to be played on it. ...