7. ICMP
*.pem
Privacy-enhanced Electronic Mail. File format used to distribute digital signed certifica tes. Base64 encoded DE R
certificate, e n closed betw e en "-----BEGIN CERTIFIC ATE-----" an d "- ----END CERTIFICATE -----"
Key Delivery M essag e (KDM)
The security key for each mo vie is delivered in a unique KD M for each digital cinem a server. The security key is
encrypted within the K DM, which means that the delivery of a KDM to the w rong s erver or wrong location will not work,
and thus such errors cannot compromise the se curity of the movie. The KDM is a small file, and is typically emailed to
the exhibitor. To create the correct s et of K DMs for a site requires knowledge of the digital certifica te in the project ion
system´s media b lock.
Digital Cin ema Package ( DCP)
A Digital Cinem a Package (DCP) is a collection of digital files used to store and convey Digital C inem a (DC) audio,
image, and data streams. The term has bee n define d by D igital Cinem a Initiatives ( DCI). General practice adopts a file
structure that is organized into a num ber of us ually multi-gigabyte size Material eX change Form at (MXF) files, which
are separately used to store audio and v ideo streams, an d auxiliary index files in XML format. T he MXF files contain
streams that are compressed, encoded, and encrypted, in order to reduce the huge amount of required storage and
to protect from unauthorized use. The image part is JPEG 2000 compressed, whereas the audio part is linear PCM.
The adopted (optional) encryption standard is AES 128 bit in CBC mode. The newer SM PT E standards are used to
conform the recommendations among different tool vendors and producers. Interop, the legacy DCP standard, is still
required to be supported b y D C P players.
Digital Cin ema Initiatives ( DCI)
DCI is a joint venture of Disney, Fox, P aram ount, S ony Pictures Entertainment, Universal and Warner Bros. Studios.
DCI’s primary purpose is to establish and document voluntary specifications for an open arc hitecture for digital cin-
ema that ens ures a uniform and high level of technical performance, reliability and quality control. Note that the DCI
specification is not a standard. Standards for digital cinema are the domain of the Society of M otion Picture and Tele-
vision Engineers (SM PTE ). "DCI compliant" is a term used to describe products that conform to the DCI specific ation.
Products that have been tested per the DCI Compliance Test Plan (CTP) are posted at the DCI c ompliance web site.
Notably, DCI compliance d oes not require compliance t o the full set of SMPTE DCP standards. A copy of the most
recent DCI spec ification c an be downloaded from the DCI website (h
ttp://dcimovies.com).
R5906847 DP2K SLP SERIES 02/06/2017 75
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