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Secure Digital Music Initiative (SDMI) Overview Provided by Texas Instruments June, 2000
What is SDMI? <ul><li>SDMI is: </li></ul><ul><ul><li>An architecture </li></ul></ul><ul><ul><li>A set of reference models ...
TI and SDMI   <ul><li>SDMI grew out of a meeting at Comdex ‘98 that was sponsored by TI and the RIAA </li></ul><ul><li>TI ...
TI and SDMI (cont’d)   <ul><li>The Verance Phase I watermark decoder will be available on TI’s TMS320C54x ™   DSPs in earl...
SDMI-Compliant System Layers <ul><li>The Licensed Compliant Module (LCM) transfers content between SDMI-compliant applicat...
SDMI Version 1.0 Reference Model <ul><li>The SDMI Version 1.0 Reference Model includes a host with application(s) and LCM(...
Screening <ul><li>The most important concept within SDMI </li></ul><ul><li>Considered by the record labels to be a major c...
SDMI Screening Timeline <ul><li>Phase I - begins when SDMI-compliant applications start to ship </li></ul><ul><ul><li>Vera...
SDMI Phase 1 Content Flow and Usage <ul><li>The “Biddle Diagram” specifies the flow of content into, out of, and within th...
The SDMI Version 1 Portable Device (PD) <ul><li>General Requirements:  A PD must </li></ul><ul><ul><li>Store all content i...
IDs and Binding <ul><li>Binding:  Content must be “bound” </li></ul><ul><ul><li>To the portable memory (PM), if the PM is ...
Robustness (i.e., Security and Tamper-Proofing) <ul><li>Content </li></ul><ul><ul><li>Content must be maintained in a secu...
SDMI Status -- June 1, 2000   <ul><li>Current SDMI priorities (in rough priority order ) </li></ul><ul><li>Definition of t...
SDMI Information on the Web <ul><li>The SDMI Portable Device Specification, Part 1, Version 1.0, is available on the publi...
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Secure Digital Music Initiative (SDMI) Overview

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Secure Digital Music Initiative (SDMI) Overview

  1. 1. Secure Digital Music Initiative (SDMI) Overview Provided by Texas Instruments June, 2000
  2. 2. What is SDMI? <ul><li>SDMI is: </li></ul><ul><ul><li>An architecture </li></ul></ul><ul><ul><li>A set of reference models </li></ul></ul><ul><ul><ul><li>Applications Layer </li></ul></ul></ul><ul><ul><ul><li>Licensed Compliant Module (LCM) Layer </li></ul></ul></ul><ul><ul><ul><li>Portable Device (PD) Layer </li></ul></ul></ul><ul><ul><li>A set of requirements: </li></ul></ul><ul><ul><ul><li>Security </li></ul></ul></ul><ul><ul><ul><li>Robustness </li></ul></ul></ul><ul><ul><ul><li>Content screening </li></ul></ul></ul><ul><ul><li>A work in progress </li></ul></ul><ul><li>SDMI is NOT </li></ul><ul><ul><li>A true standard </li></ul></ul><ul><ul><li>A single file format </li></ul></ul><ul><ul><li>A single cryptographic algorithm </li></ul></ul><ul><ul><li>A single coder </li></ul></ul><ul><ul><li>Designed for interoperability </li></ul></ul>Secure Digital Music Initiative = SDMI
  3. 3. TI and SDMI <ul><li>SDMI grew out of a meeting at Comdex ‘98 that was sponsored by TI and the RIAA </li></ul><ul><li>TI supports SDMI, and believes a programmable TI Digital Signal Processor (DSP) solution is the best choice for the changing SDMI environment </li></ul><ul><li>TI was first to announce SDMI-compliant portable solutions (with Liquid Audio, FhG and SanDisk) </li></ul><ul><li>SDMI-compliant portable players using TI DSPs are shipping now. The first SDMI-compliant player was the Sony VAIO® Music Clip™, which started shipping in the US in January ‘00. </li></ul>
  4. 4. TI and SDMI (cont’d) <ul><li>The Verance Phase I watermark decoder will be available on TI’s TMS320C54x ™ DSPs in early 3Q00 </li></ul><ul><li>The TI C54x-based evaluation module (EVM) is one of the 3 platforms that Phase II proposers will use to implement their technology. Therefore SDMI Phase II will be available on C54x very soon after the Phase II technology is chosen. </li></ul><ul><li>TI has been approved as an SDMI ID Assignment Authority and has been granted a block of 64-bit unique IDs for use in TI DSP-based devices with built-in flash memory </li></ul>
  5. 5. SDMI-Compliant System Layers <ul><li>The Licensed Compliant Module (LCM) transfers content between SDMI-compliant applications (S/W jukeboxes, etc.) and portable devices (PDs) or portable media (PM). It is roughly equivalent to a device driver. </li></ul><ul><li>The application may delegate screening and other functions to the LCM or other trusted task -- this is simply one possible structure. </li></ul>
  6. 6. SDMI Version 1.0 Reference Model <ul><li>The SDMI Version 1.0 Reference Model includes a host with application(s) and LCM(s) interfaced to a portable player and/or portable media. </li></ul><ul><li>Inputs to the Reference Model may include CD, Electronic Music Distribution (EMD), portable media, DVD, etc. </li></ul>
  7. 7. Screening <ul><li>The most important concept within SDMI </li></ul><ul><li>Considered by the record labels to be a major concession </li></ul><ul><li>Allows perpetual usage of current (“legacy”) content (existing CDs and MP3s, etc.), but legacy content must be screened, encrypted, and bound to a specific player or piece of media </li></ul><ul><li>Designed to enable the secure distribution of “new” (watermarked) content </li></ul><ul><li>Phase 2 technology will use watermarking or similar means to detect new content that has been illegally copied and distributed. </li></ul>
  8. 8. SDMI Screening Timeline <ul><li>Phase I - begins when SDMI-compliant applications start to ship </li></ul><ul><ul><li>Verance (formerly Aris/Solana) watermarking technology selected for Phase I </li></ul></ul><ul><ul><li>3 bits decoded: “Phase 1 trigger” plus two copy control bits (DVD-A CCI bits) </li></ul></ul><ul><ul><li>All SDMI-compliant Phase I applications must implement screening for the Phase I trigger </li></ul></ul><ul><li>Phase II - begins when content providers start shipping content with the Phase I trigger and the Phase II technology </li></ul><ul><ul><li>Phase II technology should be selected late 2000 or early 2001. Phase II proposals are due in June 2000. </li></ul></ul><ul><ul><li>The Phase II technology may require re-marking (changing “copy once” to “copy no more”. </li></ul></ul><ul><ul><li>When Phase II begins, applications will see the Phase I trigger and request an upgrade for the application to a Phase II application </li></ul></ul><ul><ul><li>Users who decline the upgrade will only be able to play legacy content </li></ul></ul><ul><ul><li>Users who upgrade will be able to play new content plus legacy content </li></ul></ul>
  9. 9. SDMI Phase 1 Content Flow and Usage <ul><li>The “Biddle Diagram” specifies the flow of content into, out of, and within the SDMI Domain, and specifies the Phase I screening process. </li></ul>
  10. 10. The SDMI Version 1 Portable Device (PD) <ul><li>General Requirements: A PD must </li></ul><ul><ul><li>Store all content in SDMI-protected form </li></ul></ul><ul><ul><li>Observe content usage rules </li></ul></ul><ul><ul><li>Only accept portable media with content in SDMI-protected format </li></ul></ul><ul><li>Inputs: </li></ul><ul><ul><li>SDMI-protected content from an LCM or PM </li></ul></ul><ul><ul><li>Embedded microphone, limited to mono, voice-grade (-3db @100 Hz, -60 dB @8 KHz. Microphone input must be stored in SDMI-protected form, and screened before it can be exported from the SDMI domain. </li></ul></ul><ul><ul><li>Unprotected digital and analog inputs must be screened within the PD and stored in SDMI-protected form </li></ul></ul><ul><li>Outputs: </li></ul><ul><ul><li>Analog output is allowed. Playback >1.5 normal speed must be degraded or pitch-corrected. Output during seek (FF/rewind) must be noticeably degraded </li></ul></ul><ul><ul><li>Unprotected digital output of content is not allowed </li></ul></ul>
  11. 11. IDs and Binding <ul><li>Binding: Content must be “bound” </li></ul><ul><ul><li>To the portable memory (PM), if the PM is removable </li></ul></ul><ul><ul><li>To the PD, if the PD has non-removable memory </li></ul></ul><ul><li>IDs: IDs must be </li></ul><ul><ul><li>Readable by the LCM and PD </li></ul></ul><ul><ul><li>Statistically or truly unique across all devices or components for a given manufacturer </li></ul></ul><ul><ul><li>A minimum length of </li></ul></ul><ul><ul><ul><li>128 bits, if randomly assigned </li></ul></ul></ul><ul><ul><ul><li>32 bits, if assigned by an appropriate authority </li></ul></ul></ul><ul><ul><li>Security must not depend on the secrecy of the ID </li></ul></ul>
  12. 12. Robustness (i.e., Security and Tamper-Proofing) <ul><li>Content </li></ul><ul><ul><li>Content must be maintained in a secure form at all times until it is played out </li></ul></ul><ul><ul><li>No unprotected content on a user-accessible bus (PCMCIA, device bay, 1394, Cardbus, etc., EXCEPT unprotected digital playback (e.g., USB speakers) is permitted, limited to 16-bit stereo at 48 KHz or less. </li></ul></ul><ul><li>Bypass/Defeating Functions or Procedures </li></ul><ul><ul><li>No switches, jumpers, traces that can be cut, secret control functions, etc., that will access to unprotected content </li></ul></ul><ul><li>Software </li></ul><ul><ul><li>Must be secured or encrypted </li></ul></ul><ul><ul><li>Must perform self-checking/authentication to prevent unauthorized modification </li></ul></ul><ul><li>Hardware </li></ul><ul><ul><li>Must protect keys/algorithms using hardware or software means </li></ul></ul><ul><ul><li>Must be designed so that removing or replacing components cannot be done without risk of damage </li></ul></ul><ul><ul><li>Must require professional tools and difficulty to defeat security functions </li></ul></ul>
  13. 13. SDMI Status -- June 1, 2000 <ul><li>Current SDMI priorities (in rough priority order ) </li></ul><ul><li>Definition of testing methods and procedures for evaluating Phase II screening technology candidates </li></ul><ul><li>Selection of Phase II technology </li></ul><ul><ul><li>Must detect that content has been compressed and then uncompressed </li></ul></ul><ul><ul><li>Need not be watermarking </li></ul></ul><ul><ul><li>Highest priority of record companies </li></ul></ul><ul><li>Discussions of the implications of screening on usability and the consumer experience </li></ul><ul><ul><li>May lead to temporary relaxation of screening procedures </li></ul></ul><ul><li>Discussion of SDMI requirements for wireless devices, and what constitutes a SDMI Portable Device </li></ul><ul><li>Completion of final trademark and licensing agreement </li></ul><ul><ul><li>Requires agreement on what constitutes SDMI compliance </li></ul></ul><ul><ul><li>Difficult liability issues still remain </li></ul></ul>
  14. 14. SDMI Information on the Web <ul><li>The SDMI Portable Device Specification, Part 1, Version 1.0, is available on the public area of the SDMI Web site at </li></ul><ul><li>http://www.sdmi.org/ </li></ul><ul><li>Additional information including a FAQ and how to join SDMI is also available on the public area of the Web site. SDMI members are given a login name and password to access the private area of the Web site, where all SDMI documents are stored. </li></ul>

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