8. ICMP
*.pem
Privacy-enhanced Elec tronic M ail. File format used to distribute digital signed certifica tes. Base64 encoded DER
certificate, enc losed betw e e n "-----BEGIN CERTIFIC ATE-----" an d "-----END CERTIFIC ATE -----"
Key Delivery Message (KDM)
The security key for each mo vie is delivered in a unique KDM for each digital cinema s erver. T he security key is
encrypted within the K DM, which means that the delivery of a KDM to the wrong s erver or wr ong 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 set of K DMs for a site requires knowledge of the digital certifica te in the projection
system´s media block.
Digital Cin ema Package (DCP)
A Digital Cinema Package (DCP) is a collection of digital files used to store and convey Digita l Cinema (DC) audio,
image, and data streams. The term has bee n defined by Digital Cinem a Initiatives ( DCI). General practice adopts a file
structure that is organ ized into a num ber of usually multi-gigabyte size Material eX change Form at (MXF) files , w hich
are separately used to store audio and video streams, and auxiliary index files in XML format. The MXF files contain
streams that are com pressed, 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) enc ryption standard is A ES 128 bit in CBC mode. The ne wer SMPTE standards are use d to
conform the recommendations among different tool vendors and producers. Interop, the legacy DCP s tandard, 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, Paramount, Sony Pictures Entertainment, U niversal and Warner Bros. Studios.
DCI’s primary purpose is to es tablish and docum ent voluntary specifications for an open architecture for digital c in-
ema that ens ures a uniform and high level of technical per formance, reliability and q uality c ontrol. Note that the DCI
specification is not a standard. Standards for digital cinema are the dom ain of the Society of Motion 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 P lan (CTP) are posted at the DCI compliance w eb site.
Notably, DCI compliance does not req uire compliance to the full set of SMPTE DCP standards. A copy of the most
recent DCI spec ification c an be downloaded from the DCI webs ite (h
ttp://dcimovies.com).
62 R5906693 DP2K-E SERIES 19/06/2015
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