5. Mandatory Optional

8. Transport Stream Command & Control Windows Media Center Tuner / Demodulator Stream Processing Tag Table Generation PBDA Services

9. Transport Packet Header

14. [Action] (Dialog Request Number) OpenMMI (DR, URI) GetValue (URI) MMI Data SUCCESS_MMI_PENDING CloseMmi CloseMmiDialog

18. Transport Stream with DFN (Entitlement Token, Error Code) CheckEntitlementToken (ET, new Dialog Request Number) SUCCESS_MMI_PENDING OpenMmi (some time later) (regular MMI sequence)

24. SetTuner(TuneXml) TunedXML SUCCESS GetTunerState()

25. </tune:Channel> Example Channel Tune Request

26. Example ChannelID Tune Request

28. Transport Stream Command & Control Windows Media Center WMDRM Indiv WMDRM Revocation Data Tuner / Demod CA Decrypt WMDRM Encrypt WMDRM License Generation PBDA Services WMDRM Session

33. Revocation Data Registration Challenge Registration Response Proximity Response Proximity Challenge Event: UpdateDrmStatus Certificate

36. Clear Data Transport Packet Header Encrypted Data

41. © 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.