Windows Media Technologies

Transcription

1 Windows Media Technologies Davide Rogai - Phd student Dipartimento di Sistemi ed Informatica - DISIT 6/21/2007 The Next Media Wave Windows Media Server Windows Media Audio/Video Windows Media Player Windows Media Encoder Windows Media DRM Windows Media SDK Better Together 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 2 Prof. P. Nesi 1

2 Windows Media Ecosystem Business Content Creation Artists Create intellectual property, digital media content Windows Media Encoder Processing Content Labels, Packaging Studios, Publishers, Protect Compressed Digital Work Distribution Windows Media Encoder License Solution Clearinghouse Providers Issue Licenses Track Transactions Windows Media Rights Manager SDK Transaction Authorization Web Solution Retailer Providers Download Host Streaming & Distribute Protected Digital Work Windows Streaming Media Server or Web Acquisition Server Consumer Portable Hardware Devices Vendors Transfer and Play Protected Media PD DRM WinCE Platform Builder WM DRM for Devices WM DRM for Transfer Networks Home Application Devices Developers Render Protected Digital Work, Transfer to Devices Windows Media Format SDK, Windows Media Device Manager 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 3 Sample Applications For WM Technology Consumer Electronics Devices Portable audio and video players CD and DVD players and burners Digital Media Receivers Mobile Phones Set Top Boxes IC Manufacturers, Technology Suppliers Chips with WM Codecs or DRM built in Ported versions of WM components for OEM use PC Applications Media Players, Jukeboxes Media Services Infrastructure Streaming media servers, web servers License Servers (for Digital Rights Management) Content Creation and DRM Encryption Servers 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 4 Prof. P. Nesi 2

3 Ultimate Streaming Experience Overview Benefit Eliminates buffering delays Optimizes the experience Features Fast Streaming Improved packet recovery techniques Improved multi-bitrate (MBR) audio/video Bandwidth detection improvements Support for standards-based protocols Requires the 9 Series player to obtain benefits 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 5 Ultimate Streaming Experience Standards-based protocols RTSP, RTP, SDP, RTCP protocols UPnP support for NAT/firewall traversal Multicast streaming - IGMPv3 support Full IPv6 support 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 6 Prof. P. Nesi 3

4 Dynamic Content Programming Server-side playlists Author using SMIL 2.0-based syntax Personalize for the specific user Execute (& enforce) on the server Change the client experience dynamically Utilize for both live and on-demand content Provide playlist functionality to non-smil devices Track user experience through extensible logging infrastructure 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 7 Dynamic Content Programming Personalized dynamic ad entries Publishing Point: Name: Training Path: c:\wmpub\wmroot mms://server/training/newcourses.wsx c:\wmpub\wmroot\newcourses.wsx 1 2 Windows Media 3 Services Server Player Windows Media stream returned NewCourses.wsx <?wsx version="1.0"?> <smil> <media src=" <media src="c:\wmpub\wmroot\content1.asf"/> <media src="c:\wmpub\wmroot\content2.asf"/> </smil> 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 8 Prof. P. Nesi 4

5 Industrial Strength Scale up WMS 9 Series far more scalable than 4.1 Greatly improved TCP performance (2x) Greatly improved broadband performance (2x) Dramatically better disk i/o by caching frequently accessed content (2x-8x+) 20,000 streams (using 20 Kbps content) achieved on a single machine 900 Mbps of total throughput (using 1 Mbps content) achieved on a single machine Updated load simulation tool on Web 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 9 Industrial Strength Scale out Distribution improvements UDP and multicast between servers Remote logging support Auto reconnect 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 10 Prof. P. Nesi 5

6 Industrial Strength Scale out Cache/proxy Plug-in model for ISVs Plug-in dictates policy Redirection support Pre-stuff capabilities Accelerated/decelerated download support Sample cache/proxy plug-in available in SDK 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 11 Industrial Strength Scale out Remote Network B WMS Cache/Proxy VPN Remote Network C Remote Network A WMS Cache/Proxy Direct Direct HQ Network WMS Distribution Server WMS Origin Server WM Encoder 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 12 Prof. P. Nesi 6

7 Industrial Strength Reliable > 60 million streams served by MSNBC Automatic connection recovery guarantees up-time through network glitches Tested in Network Load Balancing clusters In-proc/out-of-proc support for plug-ins 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 13 WMS System Requirements Component Operating system Processor Memory Network interface card Requirement Windows Server 2003, Standard Edition Single 233 megahertz (MHz) processor 256 megabytes (MB) of RAM 100 megabit Ethernet card Recommendation Windows Server 2003, Enterprise or Datacenter Edition Dual 550 megahertz (MHz) processors (or higher) 1 gigabyte (GB) of RAM or higher Gigabit Ethernet card Free hard disk space 21 MB and adequate disk space for content storage 21 MB and adequate disk space for content storage 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 14 Prof. P. Nesi 7

8 What is DRM? DRM stands for Digital Rights Management DRM protects content from unauthorised use DRM is a flexible solution that can implement a wide range of business models DRM protected files need a license to unlock them 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 15 How can I use DRM? DRM supports the following business models: Preview and purchase Pay per view Rental Subscription Controlled distribution of media assets Can be tailored to any other model 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 16 Prof. P. Nesi 8

9 What is a License? A license consists of the following: The KEY used to unlock the content Rights that govern the use of content A certificate that identifies the license issuer's authority to create the license A license is bound to the users PC, it cannot be transferred 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 17 How is DRM Secure? Encryption DRM uses strong encryption (128 bit) that has never been cracked Digital signatures The content header is digitally signed to prevent tampering Separation of licenses from content Licenses are kept separate from content, so content can be widely and securely distributed Revocation There are various ways to prevent players from playing content Individualisation Prevents a compromised player from being widely distributed over the internet 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 18 Prof. P. Nesi 9

10 Individualisation Individualisation is the process of making each player unique by linking the player to the PC it is installed on It prevents a hacked player from being widely distributed over the internet Content can be packaged so that it is only played on individualised players When a player that is not individualised tries to play content that requires individualisation, the user is required to get a security upgrade 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 19 Process Overview 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 20 Prof. P. Nesi 10

11 How it works 1. Packaging 2. Rights 3. Distribution 4. License Acquisition 5. License Delivery 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 21 Packaging Generate Content Header: Key ID A String to identify content and generate the KEY License Acquisition URL Location that specifies where to get licenses from Individualisation Version Minimum Individualisation a player must have to play the content (optional) Content ID Uniquely identifies the file (optional) Additional Attributes Provides additional information for packaging and managing file (optional) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 22 Prof. P. Nesi 11

12 Packaging Sign The Header Private Signing Key To prevent the header from tampering (Kept secret) Generate the KEY Key ID Stored in the content header (public) License Key Seed Kept secret and not stored in content header (private) Key ID + License Key Seed = KEY Encrypt the file using the KEY 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 23 Packaging Input formats Any input source that can be converted to Windows Media Format WAV AVI Output formats: WMA WMV 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 24 Prof. P. Nesi 12

13 Packaging Supported Codecs Windows Media Audio 1 Windows Media Audio 2 Windows Media Audio 7 Windows Media Audio 8 Windows Media Audio 9 Windows Media Audio 9 Professional Windows Media Audio 9 Lossless Windows Media Audio 9 Voice Windows Media Video 7 Windows Media Video 8 Windows Media Video 9 Windows Media Video 9 Screen Windows Media Video 9 Image Microsoft MPEG-4 Video 1 Microsoft MPEG-4 Video 2 Microsoft MPEG-4 Video 3 Windows Media Screen 7 ISO-MPEG-4 (version) 1 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 25 Rights Assign license rights to content The license is separate from the packaged file Rights in the license can be changed after a file is packaged. 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 26 Prof. P. Nesi 13

14 License Rights Allow Backup Restore Allow Burn To CD Allow Play On PC Allow Transfer To Non SDMI Allow Transfer To SDMI Begin Date Burn To CD Count Delete On Clock Roll back Disable On Clock Rollback Exclude Application Expiration After First Use Expiration Date Expiration On Store Minimum App Security Minimum Client SDK Security Play Count PM App Security PM Expiration Date PM Rights Transfer Count 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 27 Using The Rights Pay per view Play count Rental Expiration after first use Useful for different time zones Expiration on store Useful for different time zones Begin & expiration dates Subscription Begin & expiration dates Controlled distribution of media assets Can include any of the above 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 28 Prof. P. Nesi 14

15 Distribution DRM protected content can be distributed using conventional methods: Web Server Streaming Server CD (WM format) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 29 Distribution DRM v9 is supported on the following Operating Systems: Windows 98 SE Windows 2000 Windows ME Windows XP DRM v9 is supported on Windows Media Player 7 and above 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 30 Prof. P. Nesi 15

16 License Acquisition License Server Process of authenticating user Does this user have a right to view the content? Depends on business model Examples include: Payment Login One time access codes Free, no authentication WM Player 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 31 License Delivery Verify the content header with the Public Signing Key Generate the KEY Get the Key ID from the content header Get the License Key Seed from the system Specify the rights for the license Deliver the license containing the KEY and rights 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 32 Prof. P. Nesi 16

17 License Delivery A license is only delivered if the user is authorised to view the content Post Delivery: 1. Content is distributed first 2. License delivered second Pre delivery: 1. License is delivered first 2. Content is distributed second 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 33 Windows Media Rights Manager 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 34 Prof. P. Nesi 17

18 Case Study: Preview and Purchase Client Online Music store Client requirements Offering users a free preview of selected content upon registration Normal purchase required after preview Technical requirements Use of pre delivery for preview license Use of post delivery for normal purchases Challenges Supporting both pre delivery and post delivery for same content Preventing users from getting multiple preview licenses Result Preview license pre delivered through browser after registration Once preview license expired, purchase is required through post delivery 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 35 Case Study: Pay per View Client Website owner Client requirements Pay per view Files should be self contained Technical requirements Integration of payment into DRM popup Challenges Integrating with a payment provider that gives instant notification on payment status Result Content that can only be played once for each payment Content that is completely self contained, including the payment process Content that can be securely shared on file sharing networks 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 36 Prof. P. Nesi 18

19 Case Study: Rental Client Online video rental Client requirements Payments made using existing payment methods on website Rental period of 3 days Good user experience Technical requirements Integration with client website License will use expiration on store (72 hours) Identifying users through use of cookies and silently delivering licenses Challenges Sharing authentication information with client website, transparent to the user Identifying user silently through use of cookies Result Client website shares authentication information through background http requests Users pay at website for a rental and later licenses are delivered silently 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 37 Case Study: Subscription Client Major Satellite channel Client requirements Live streaming of satellite channel feed Live stream only accessible on subscriptions of 1 day, 1 month or 1 year Technical requirements Use of DRM profile to encrypt stream in real time License will use begin dates and expiration dates Integration with client website Challenges To prevent users from rolling their clock back to get round license terms Managing 3 different licenses for same content Result Only subscribers allowed access to live stream 3 different subscription periods available Stream becomes disabled if clock rolled back 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 38 Prof. P. Nesi 19

20 Case Study: Controlled Access Client Investment bank Client requirements No payment or authentication required for access To be able to restrict access to content immediately at an unknown future date Statistics on number of plays Technical requirements Each play of content will need a license (play count of 1) Silent license delivery Counting licenses delivered Challenges To be able to restrict access to content at an unknown time when none of the rights can be preconfigured to do this Result Each time the content is played a license request is needed Client can restrict access to content immediately with a click of a button, the license server stops issuing licenses for content Statistics on content access 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 39 Online Music Store Example The steps required are as follows: Defining the business model Develop database that will support business model Website integration Encoding of content into Windows Media Packaging content License terms License delivery 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 40 Prof. P. Nesi 20

21 Online Music Store Example Defining the business model Subscriptions Subscriptions will start from the registration date Subscriptions will end 1 calendar month after start date Subscriptions will allow access to all content Credits Monthly subscriptions are credited with 400 credits Content will cost 5 credits per play Once credits expire content will not be playable 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 41 Online Music Store Example Develop database that will support business model User id Username Password Start date End date Credits 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 42 Prof. P. Nesi 21

22 Online Music Store Example Website Integration Payments made at website Website maintains subscription database Website can uniquely identify user (registration) Logging on/registration stores cookie on users computer (user id) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 43 Online Music Store Example Encoding of content into Windows Media Encoded into WMA or WMV Encoding specifications tailored to target audience 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 44 Prof. P. Nesi 22

23 Online Music Store Example Packaging content For this example: Files can be encrypted with unique keys All files can be encrypted with one key 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 45 Online Music Store Example License terms Static rights Play on PC Play count = 1 Allow burn to CD = false Disable on clock rollback Dynamic rights (pulled from database) Begin date Expiration date 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 46 Prof. P. Nesi 23

24 Online Music Store Example License delivery 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 47 Online Music Store Example Issues Every clients requirements are unique Clients may already have existing website and membership databases Need to tailor solution to existing infrastructure Share only authentication information Filename (needed for keys) User ID (from cookie to identify users) Expiration date Content, license and key management can get complex 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 48 Prof. P. Nesi 24

25 How To Obtain A License Some WM components can be downloaded from the web Many of these are self-licensing See Other WM components can be requested via license application Components are provided on completion of application See 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 49 Windows PC Applications Windows PC Applications may Download content and licenses from the web Play or burn content Render streaming content Transfer content to a portable player Stream content to a Digital Media Receiver Examples Jukebox and Media Player applications Active web pages PC apps can be built from Windows Media Player SDK, or Windows Media Format SDK (WMF SDK) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 50 Prof. P. Nesi 25

26 Windows PC Applications Windows application obtains content and licenses, plays or burns content, and may transfer to portable device Technologies and Licenses you may need Windows Media Player SDK Self-licensing (no fees or royalties) <opt> Windows Media Player Distribution Agreement Request via license application. No royalties or fees WMF SDK Self-licensing (no fees or royalties) <opt> Protected content requires DRM Certificates DRM Client Certificate Agreement for WMFSDK 9s For applications which play or burn protected content Request via license application. No royalties or fees DRM Transfer Certificate Agreement for WMFSDK 9s For applications which transfer protected content to portable devices Request via license application. No royalties or fees 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 51 Consumer Electronics Devices Consumer Electronics devices may Use WM audio/video codecs to create or play content Render content protected by WM Digital Rights Management Be built on various chipset and operating systems Examples Digital cameras Portable audio and video players Mobile phones Digital Media Receivers Set Top Boxes CD and DVD players WM components are available via license request See 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 52 Prof. P. Nesi 26

27 Digital Camera Camera connects and transfers images to Windows PC without custom driver Technologies and Licenses you may need: Media Transfer Protocol (MTP) specification MTP Development and Distribution Agreement (no royalties for most uses) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 53 Portable Audio/Video Players Or Mobile Phones Devices obtain content and licenses directly from network or through Windows PC Technologies and Licenses you may need: WM Audio/Video Codec sources or object code WMFC Source Dev Agreement (source fee, no royalties) WMFC Distribution Agreement (reasonable royalties) Media Transfer Protocol specification MTP Development and Distribution Agreement (no fees or royalties) <legacy> WM Portable Device DRM (PDDRM) object code WMFC Distribution Agreement (reasonable royalties) <new> Next Generation DRM for Portable Devices sources or object code WM DRM for Devices Development and Interim Product Distribution Agreement (source fee, no royalties) WM DRM for Devices Distribution Agreement (reasonable royalties) <opt> DRM for WinCE 4.2 object code See your Distributor or Account Manager 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 54 Prof. P. Nesi 27

28 Digital Media Receivers Devices play protected content from PC to entertainment systems Technologies and Licenses you may need WM Audio/Video Codec sources or object code WMFC Source Dev Agreement (source fee, no royalties) WMFC Distribution Agreement (reasonable royalties) Next Generation DRM for Network Devices sources or object code, plus Next Generation DRM for Portable Devices sources or object code WM DRM for Devices Development and Interim Product Distribution Agreement (source fee, no royalties) WM DRM for Devices Distribution Agreement (reasonable royalties) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 55 Set Top Boxes Devices receive protected content and licenses from network; render to entertainment system Technologies and Licenses you may need WM Audio/Video Codec sources or object code WMFC Source Dev Agreement (source fee, no royalties) WMFC Distribution Agreement (reasonable royalties) Next Generation DRM for Network Devices sources or object code WM DRM for Devices Development and Interim Product Distribution Agreement (source fee, no royalties) WM DRM for Devices Distribution Agreement (reasonable royalties) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 56 Prof. P. Nesi 28

29 CD And DVD Players Devices include built-in in support for WMA or WMV encoding Technologies and Licenses you may need WM Audio/Video Codec sources or object code WMFC Source Dev Agreement (source fee, no royalties) WMFC Distribution Agreement (reasonable royalties) HighMAT specification Web download (reasonable royalties) See 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 57 Media Services Infrastructure Media Services Infrastructure includes Content encoding Content protection/encryption Content distribution License generation Windows applications and SDKs are available on the web or via license request Protocol specifications for non-windows applications are available through the Microsoft Communications Protocol Program (MCPP) 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 58 Prof. P. Nesi 29

30 Content Packaging Systems compress content into WMA or WMV format and/or encrypt content in DRM Content Packaging Technologies and Licenses you may need: WM Encoder 9S is a Windows application which compresses and/or encrypts content Web download Self-licensing. No royalties or fees WM Rights Manager SDK 9S creates a Windows-based server which encrypts content (and can deliver DRM licenses) WM Rights Manager SDK 9S Agreement Request via license application. No royalties or fees 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 59 License Management Systems generate licenses for protected content as needed by consumers, honoring rules of content owners Technologies and Licenses you may need WM Rights Manager SDK 9S creates a Windows-based server which (encrypts content and) can deliver DRM licenses WM Rights Manager SDK 9S Agreement Request via license application. No royalties or fees 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 60 Prof. P. Nesi 30

31 Content Distribution Web and streaming servers deliver content to consumers Technologies and Licenses you may need To create a Windows-based web server Use Internet Information Services License included in Windows Server 2003 To create a Windows-based streaming media server Use Windows Media Services License included in Windows Server /21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 61 Riepilogo Soluzione Windows Media Streaming efficiente Basato sulla conoscenza di Streaming Server e Media Player Scalabilità Presenza di sottoreti di distribuzione e cache/proxy DRM Licenze Autenticazione dei client Uso della crittografia 6/21/2007 Sistemi Distribuiti, Univ. Firenze, Seminario. Dr. D. Rogai, ref. Prof. P. Nesi 62 Prof. P. Nesi 31