Wikipedia
mpDRM is a content independent Digital Rights Management (DRM) system developed and licensed by Protect Software GmbH, a German corporation with headquarters located in Dortmund, Germany and subsidiaries in Canada and the United States.
mpDRM is internally based on the Open Mobile Alliance (OMA) standard but is accessed on the server- and client-side through the Microsoft DRM interfaces in use at most online video sales services.
mpDRM is often referenced as “Motion Picture Digital Rights Management” but stands actually for “Multi-Purpose Digital Rights Management” as it supports not only video but also audio and even software containers.
mpDRM is most frequently used with FluxDVD files to control the playback, burn and export processes based on restrictions defined by the content owners and imposed by the content distributors via DRM licenses.