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Features of Windows Media DRM
The latest version of Windows Media digital rights management (DRM) is a
flexible platform that makes it possible to protect and securely deliver a la
carte and subscription content for playback on a computer, portable device, or
network device. Windows Media DRM 10 allows for the seamless flow of content
to almost any device, offers the widest range of purchase and rental options
for digital media, and ensures the security of premium content as it flows
from device to device.
Secure Delivery of Content
Windows Media Rights Manager, a component of the Windows Media DRM platform, is a technology that helps protect the rights of content owners, while enabling consumers to obtain digital content easily and legitimately.- Persistent Protection
Windows Media Rights Manager "locks" digital media files with a license key to maintain content protection, even if these files are widely distributed. Each license is uniquely assigned to each computer. This prevents illegal distribution of digital media files. - Strong Encryption
Windows Media Rights Manager includes proven encryption schemes that ensure distributed digital media files are not exposed to piracy or other illegal use. - Individualization
Windows Media Rights Manager makes each player unique by linking a player to the host computer. This prevents a compromised player from being widely distributed over the Internet. With individualization, any compromised player can be identified and disabled during the licensing process. - Separately Distributed Licenses and Content
Licenses are issued independently of the actual digital media files, providing maximum flexibility and allowing wide distribution of content. Each time a digital media file is played, Windows Media Rights Manager checks to see if the consumer's computer has a license. Consumers who do not have a valid license are directed to a license registration page. - Secure Audio Path
Windows Media Rights Manager ensures content protection in the operating system from the player to the sound card driver in the Windows Millennium Edition and Windows XP operating systems. This secure relationship reduces the likelihood that any unauthorized program will capture a digital media stream within a computer. - Improved Revocation and Renewability
Windows Media Rights Manager enables compromised players to be revoked when new players become available. - Easy-to-Change Licensing Terms
Because licenses and digital media files are stored separately, licensing terms can be changed on the licensing server without the need to redistribute or repackage the digital media file. - Real-Time Encryption of Content
With Windows Media Rights Manager 9 Series and later, content owners can deliver protected live digital media content—such as news, rock concerts, or major sporting events—over the Internet as the events are happening, without requiring that the content first be batched and saved. This new capability offers simultaneous encoding and encryption and protects "live" content from unauthorized use, while providing consumers with a real-time experience as they watch broadcasts over the Internet.
Back to the topPC Playback
Playback of protected Windows Media–based content is well established, with over 500 million installed digital media players capable of playing protected content. Here are some of the improvements Windows Media DRM 10 offers on the computer.- License Chaining
Allows content service providers to create "root" licenses (which contain information that governs whether or not a file can be played, such as expiration date) and "leaf" licenses for the content itself. This is useful for subscription services because only the single root license needs to be updated each renewal period as opposed to renewing hundreds or thousands of individual content licenses. - Improved License Store Performance
Minimizes delays as consumers acquire more DRM licenses on their computers; allows for the purging of older, timed-out licenses; and scales well as a digital media library increases. - Synchronization Lists
Automatically synchronizes count-based or time-based licenses on devices.
Back to the topPortable Device Playback
These features apply to devices such as portable audio and video players, set-top boxes, and mobile devices with audio and video capabilities. Devices like these can store and play back audio and video content from a local hard disk, or support playback of video-on-demand content over a private network such as a cable system.- License Chaining
Allows content service providers to create "root" licenses (which contain information that governs whether or not a file can be played, such as expiration date) and "leaf" licenses for the content itself. This is useful for subscription services because only the single root license needs to be updated each renewal period as opposed to renewing hundreds or thousands of individual content licenses. - Metering
Extends subscription business models by enabling the anonymous reporting of tracks played. This provides the business infrastructure that allows subscription content to be transferred to portable devices. - Secure Clock
Provides the capability for devices to acquire and play subscription music content according to the business rules associated with the license. - Direct License Acquisition
Enables devices that are capable of connecting directly to content service providers to acquire content directly rather than having to connect through a computer. - Derivative Rights
Allows content owners to specify different rights for devices and the PC. - Innovative Rental or Subscription Models
Content service providers can control license start times, stop times, and duration to create innovative business models. These different rights let content providers optimize their own business rules and let consumers enjoy their content on virtually any device, and under purchased, rental, or subscription plans.
Back to the topNetwork Device Playback
These features apply to devices such as set-top boxes, DVD players, digital media receivers, and digital audio receivers. These devices stream content from a computer on the local network. They cannot cache or store the content, and the content remains fully encrypted across the network.- Output Protection
Lets consumers play content in a protected form over home networks without requiring local storage. - Standards-based Encryption
- Same Revocation Capabilities as PCs and Portable Devices
- Proximity Detection to Ensure Authorized Access
