Authentication, Playback and Storage. A valid license, containing the unique cryptographic key/keys and other information necessary to decrypt the associated content and the set of usage rules associated with the content, shall be required in order to decrypt and play a specific instance of content. Each license shall be keyed to work only on a specific individual end user device and shall be incapable of being transferred between devices. (Note: License/grants are per Approved Set-Top Box. A separate grant is sent to each Approved Set-Top Box within a home.) Each installation of the trusted client software on an Approved Set-Top Box shall be uniquely identifiable at the hardware level. The content protection system shall support a time-based rental model. The content protection system shall prohibit recording onto removable media or portable devices.
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