Transcript A Study of the Secure Digital Music Initiative

A Study of the Secure Digital Music Initiative
Brandon Sutler
Vineet Aggarwal
Sachin Kamath
University of Virginia
CS 551
In The Red Corner…
Recording Industry
Association of America
(RIAA)
RIAA – Who?
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$15 Billion Industry
RIAA Companies –
90% all albums
recorded and sold in
US.
“Big 5” – BMG, Sony,
Warner, Capitol,
Universal
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75% of Market Share
In the Blue Corner…
The Consumers (You)
The Problem
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Proliferation of
Digital Media
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Distribution
Storage
Copyright
Infringement
Consumer
experience
Where’s SDMI?
RIAA
The Consumers
SDMI, Ideally
SDMI, Actually
SDMI Introduction
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Deliver secure digital music
to consumers
Give good consumer
experience
Protect artist’s right to make
money
Protect label’s right to
control industry
Discussion Overview
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The big picture
SDMI’s plan
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Watermarking Technology
Social implications
Conclusion
The Big Picture
Or, What Did We Do?
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SDMI Specification
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Phase I
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Watermarking
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SDMI
Verance, 4Centity
Phase II
Legal Issues
Consumer
Acceptance
The SDMI Protocol
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Step 1: Determine if
music is SDMI
Protected Content
Step 2: Decrypt
Step 3: Check
trigger
Step 4: Play or
Reject
SDMI Phase I Screen
 Detect “trigger”
 Based on watermarking technology
 “millenium trigger”
 Detect “Usage Rules”
 Govern Copy, Move, Check-in/Check-out,
Export, etc.
 Not yet written!
Phase I Triggers
SDMI Protected Content
 If trigger present
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Unprotected Content
 If trigger present
reject content
message to upgrade
to Phase II displayed.
No trigger: content
admitted
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reject content
message to upgrade
to Phase II displayed.
No trigger
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“no more copies:”
rejected
Otherwise, admitted
Digital Watermarks
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Awarded job for SDMI
Electronic DNA©
Interwoven tag
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Digital Noise
15 second interval
Stored Information
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Copy permissions, Identifier tag, Additional Info
Digital Watermark Spec.
Content Owner Tag (8 bits)
Additional Info (optional 60 bits)
Copy Permissions (4 bits)
- Copy once, never, unlimited…
Phase II
Content
Phase II Mark present
Compressed
Mark not present
Not compressed
ADMIT
Supposed to be
ADMIT
Not supposed to be
ADMIT
REJECT
NOT YET WRITTEN
Legal Issues
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Possible antitrust
violations
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SDMI is a “specification,
not an agreement”
Neutral industry
standards that benefit
consumers are not
inherently illegal
But what is the benefit to the artists?
Legal Issues
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Fair Use
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Backwards compatibility
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Example
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Default limit: four copies
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No interoperability
Social Issues
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RIAA inspections
Backwards compatibility
Non-compliance
Hacker tools would make circumventing
copy protection routine
No interoperability
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Consumer Cost:Benefit
Conclusions
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Although a decent attempt,
SDMI will fail in the long run
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Three points of failure:
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Lack of consumer support
Legal challenge just around the
corner
Failure to come up with “Phase II”
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Too much, too fast
Questions