Inter-Society was founded in 1978 for the purpose of fostering inter-active
dialogue and joint projects among distribution, exhibition and trade organizations.
The Inter-Society Digital Cinema Forum (ISDCF) is a sub-group of the Inter-Society,
providing the industry with a forum where issues related to launch of digital cinema
can be discussed.
More information on these organizations can be found at
ISDCF has produced important documents related to the development of digital
cinema, the most important of which are posted here for wide dissemination.
Distribution Formats SMPTE DCP and Interop DCP - Including Accessibility
The ISDCF SMPTE DCP Transition Review provides a
reference for those seeking a specification of SMPTE DCP standards and Interop DCP requirements.
This document includes the specifications for packaging accessibility content for both SMPTE DCP and Interop DCP.
It also specifies the CSP/RPL protocol that enables 3rd-party closed caption systems to communicate with
digital cinema servers.
Interop Audio Channel Recommendation describes the recommended audio channel assignment for Interop DCPs. Note
that this specification requires accessibility audio channels HI and VI-N to be distributed on channels 7 and 8. This
dictates how cinemas are wired, and, accordingly, imparts direction to SMPTE DCP-capable products to route HI and VI-N
audio to media block outputs 7 and 8.
Security Key Management
Fox has undertaken a comprehensive and public effort to define web-based methods for
security key management in digital cinema. Fox's FLM-X method for an improved
FLM and its communication method is fully described at http://flm.foxpico.com/
(username: isdcf password: isdcf).
Below is draft specification from Fox, called Theater Key Retrieval, or TKR, describing a clever method for automating the pull of
KDMS by the digital cinema server. Also listed below is a draft recommended practice for KDM formulations for Interop and SMPTE DCPs.
Key Delivery Message (KDM) Naming Convention
This information is no longer in discussion in ISDCF, but is included here as some users will find it to be useful.
KDMs arrive in theatres from many sources, typically by email. Theatre operators have a difficult time
sorting and identifying the emails and files that are sent. The KDM Naming Convention is the recommended naming
scheme for ZIP files containing KDMs, and for the KDM filename itself. It is based on the many
of the name types used in the Digital Cinema Naming Convention (see below). No further work has taken place on
this scheme. The KDM Naming Convention is described at kdmNamingConvention.com.
Digital Cinema Content Naming Convention
The content name displayed by digital cinema servers can become confusing when
trailers or other movie versions have the same name as the movie version to be shown.
The Digital Cinema Naming Convention was created to address this problem.
The Digital Cinema Naming Convention is described at DigitalCinemaNamingConvention.com.
NIST Security Standards
Digital cinema security, per the DCI specification, relies on a series of NIST standards that, due to their complexity and nature, are perpetually in amendment. NIST documents that affect digital cinema are listed below.
NIST Miscellaneous and Special Publications
SP 800-131A Transitions: Recommendation for Transitioning the Use of Cryptographic Algorithms and Key Lengths (Jan 2011)
Received Comments on SP 800-131 (as originally published May 2010. Scroll to end for comment from DCI)
DISCUSSION PAPER: The Transitioning of Cryptographic Algorithms and Key Sizes (from FIPS 186-2 to FIPS 186-3)
SP 800-107 Recommendation for Applications Using Approved Hash Algorithms (February 2009)
SP 800-57 Recommendation for Key Mangement Part 1 (March 2007)
SP 800-57 Recommendation for Key Mangement Part 2 (November 2002)
SP 800-57 Recommendation for Key Mangement Part 3 (December 2009)
FIPS-180-2 Secure Hash Standard (SHS) (August 2002)
FIPS-180-3 Secure Hash Standard (SHS) (October 2008)
FIPS-186-2 Digital Signature Standard (January 2000)
FIPS-186-3 Digital Signature Standard (June 2009)
FIPS 140-2 Security Requirements for Cryptographic Modules
FIPS 140-2 Annex A (January 4, 2011)
FIPS 140-2 Annex B (June 14, 2007)
FIPS 140-2 Annex C (November 24, 2010)
FIPS 140-2 Annex D (January 4, 2011)
Implementation Guide for FIPS 140-2 (December 23, 2010)
FIPS-140-3 DRAFT Security Requirements for Cryptographic Modules (Revised Draft September 11, 2009)