Digital Cinema System Specification V1.0

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Digital Cinema System Specification V1.0
Jean-Jacques Quisquater UCL Crypto
Group Université catholique de Louvain jjq_at_dice.u
cl.ac.be http//uclcrypto.org August 16, 2005
Rump session Crypto
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Digital Cinema Initiatives, LLC (DCI) is the
entity created by seven motion picture
studios - Disney, - Fox, -
Metro-Goldwyn-Mayer, - Paramount Pictures, -
Sony Pictures Entertainment, - Universal Studios
and - Warner Bros. Studios.
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• Final specifications for Digital Cinema July 20,
  2005
• See http//www.dcimovies.com/
• 80 pages out of 156 dedicated to security
• Lot of protocols for the security of images,
  sounds, subtitles, ...
• Putting together standards (NIST, IETF, ISO, IEC,
  ...),
• Must protect for a long time the Hollywood
  production in the context of theaters,
• Will change dramatically the distribution of
  movies

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Basic cryptographic components

• Encryption of images and sound AES (128 bits)
  in CBC mode,
• Protection of keys AES (128 bits) or triple DES
  (112 bits),128-112 bits of entropy,
• RSA signature with SHA-256, 2048 bits, 2 or 3
  factors (each at least 680 bits), 128 bits of
  entropy
• X.509v3 digital certificates,
• Data integrity HMAC-SHA1

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• Other security features
• TLS
• Watermarking
• Forensics
• Secure hardware

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Conclusion

• An interesting report to study,
• If you want to study it together, send me an
  email, lot of things to find,
• Thanks for your attention
• Good Night!