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Digital Cinema System Specification V1.0

Digital Cinema System Specification V1.0. Jean-Jacques Quisquater UCL Crypto Group Université catholique de Louvain jjq@dice.ucl.ac.be http://uclcrypto.org August 16, 2005 Rump session Crypto.

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Digital Cinema System Specification V1.0

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  1. Digital Cinema System Specification V1.0 Jean-Jacques Quisquater UCL Crypto Group Université catholique de Louvain jjq@dice.ucl.ac.be http://uclcrypto.org August 16, 2005 Rump session Crypto

  2. 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.

  3. 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

  4. 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

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

  6. 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!

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