DCI Specs - Digital Cinema Initiatives

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• Essence Encryption and Cryptography (Section 9.7)– Cryptographic requirements foressence encryption and related cryptography.• Digital Certificates, Extra-Theater Message and Key Delivery MessageRequirements (Section 9.8.) – Detailed requirements for Digital Certificates, Extra-Theater Message and Key Delivery Message.The following acronyms are introduced and used extensively in Section 9SMKDMETMITMTDLFMSESPBRRPSecurity ManagerKey Delivery MessageExtra-Theater MessageIntra-Theater MessageTrusted Device ListForensic Marking (Marker)Security EntitySecurity Processing BlockRequest-Response Pairs9.2. Fundamental Security System RequirementsThis section describes the goals for the security system. Cryptographic security requirescommunications connectivity between Distribution and Exhibition, above what is required for35mm film. However, at no time do security requirements mandate continuous on-lineconnectivity to an exhibition facility.Note: Due to the dynamic nature of security technology, DCI reserves the right, at some futuretime, to update requirements and may require changes to Digital Cinema systems as situationswarrant.9.2.1. Content Protection and Piracy PreventionThe security system shall provide a means for the securing of content against unauthorizedaccess, copying, editing, and playback. Protection shall be standardized primarily throughthe application of encryption technology, management of content key access and robustlogging.9.2.2. Single Inventory and InteroperabilityThe security system shall support a single inventory Digital Cinema Package (DCP)delivered to every compliant theater installation. The security system architecture shallsupport file interoperability for both the Digital Cinema Package (DCP) and the Key DeliveryMessage (KDM). The security system architecture shall require system inoperabilitybetween Security Manager (SM) and Screen Management System (SMS).9.2.3. ReliabilityThe security system shall recognize that the show must go on” except in extremecircumstances. The model shall support intelligent means to locate failures expeditiously,and support field replaceable security devices.DCI Digital Cinema System Specification v.1.2 Page 92
9.2.4. Support Forensics and Attack Detection• The security system shall produce records of the access to secured content atauthorized facilities.• The security system shall support techniques to expose security attacks in processprior to an actual loss.• The security system shall support techniques (e.g., Forensic Marking) to implantevidence of origin of the content for use in tracing unauthorized copies of the contentto the source.• The security system shall support the interface(s) and operation of anti-camcorderdevices. This may include, but is not limited to, the ability to log the results of an anticamcorder(detection of a camcorder event) or a non-functional anti-camcorder-ingsystem.9.2.5. Resist ThreatsThe security system shall support prevention and detection of the following threats:• Content theft (piracy) – as noted above• Unauthorized exhibition (e.g., at wrong facility)• Manipulation of content (e.g., editing)• Un-logged usage of content• Denial of Service9.3. Security Architecture OverviewThis section describes the architectural elements and fundamental operation of the DigitalCinema security system.9.3.1. Definitions• Content – The digital representation of a visual, audio or subtitled program. Contentexists in several forms (encrypted/plaintext, compressed/uncompressed, etc) atvarious stages of the process in the Digital Cinema system.• Digital Cinema Package (DCP) – The standardized form of content intended fordelivery to theatrical exhibition facilities. DCP content components are selectivelyencrypted by the Rights Owner.• Equipment Suite (Suite) – A set of security devices (including one SecurityManager) that collectively support playback for a single auditorium.• Extra-Theater Message (ETM) – One-way information packet that passes into orout of, the exhibition facility. The ETM is a generic message container.• Forensic Mark – The generic term used in this specification for any or all of thefollowing: watermarking, fingerprinting, and/or forensic watermarking functions usedat the time of playback.• Intra-Theater Message (ITM) – The data packet that passes between securitydevices assigned to a single auditorium. ITM(s) operate on two-way channels.• Key Delivery Message (KDM) – The Extra Theater Message (ETM) for deliveringDCI Digital Cinema System Specification v.1.2 Page 93
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Digital Cinema Initiatives, LLCDigi
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Table of Contents1. OVERVIEW 151.1.
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5.2.2. Packaging Fundamental Requir
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7.5.5.1. Introduction..............
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9.4.2.5. Screen Management System (
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Table of FiguresFigure 1: System Ov
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equirements for encrypting the esse
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• This document specifies a basel
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DCI Digital Cinema System Specifica
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2.1.1. Major System Concepts2.1.1.1
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2.1.1.8. ReelsFeature films have be
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Metadata within the DCDM provides a
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3.2.1.6. Transfer FunctionThe CIE X
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The information, as shown in Table
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AES Pair#/Ch# Channel # Label / Nam
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3.3.4. File Format3.3.4.1. GeneralT
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3.4.3. Timed Text Concepts and Requ
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• All decoders shall decode each
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Page 44 and 45: 5.2.2.3. InteroperableThe Packaging
Page 46 and 47: Figure 6: Example Show PlaylistThe
Page 48 and 49: Length (Value Length), followed by
Page 50 and 51: which it was stopped or paused. It
Page 52 and 53: 5.3.4.2. Frame BoundariesThe Audio
Page 54 and 55: • Rating• Aspect Ratio• Image
Page 56 and 57: • Annotation Text parameter (opti
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Page 60 and 61: 7.2.3.1. ReliabilityA key part of t
Page 62 and 63: • Country• Rating• Aspect Rat
Page 64 and 65: facility, while the system is in op
Page 66 and 67: Exhibitor and the Distributor, data
Page 68 and 69: 7.5.2.2. Ingest InterfacesExcept fo
Page 70 and 71: (channels) * hours * 60 min/hour *
Page 72 and 73: 7.5.4.2.4. UnpackagingAny packaged
Page 74 and 75: 7.5.6. Audio System7.5.6.1. Introdu
Page 76 and 77: made up of Theater System devices a
Page 78 and 79: DCI Digital Cinema System Specifica
Page 80 and 81: 8.2.2.3. Alternative ContentThe pro
Page 82 and 83: With the projector turned off or wi
Page 84 and 85: Image ParametersNominal(Projected I
Page 86 and 87: Input Code Values Output Chromatici
Page 88 and 89: 8.4. Projector Interfaces8.4.1. Int
Page 90 and 91: • Lens Shift Up / Down• Lamp Mo
Page 94 and 95: content keys and Trusted Device Lis
Page 96 and 97: Figure 14: Digital Cinema Security
Page 98 and 99: Figure 15 presents the two fundamen
Page 100 and 101: DCI Digital Cinema System Specifica
Page 102 and 103: 9.4.2.3. Media Blocks (MBs)The term
Page 104 and 105: which TLS-based authentication alon
Page 106 and 107: working with the security infrastru
Page 108 and 109: Figure 18: Show Playback Overview9.
Page 110 and 111: a. Playout shall be fully supported
Page 112 and 113: 9.4.5. Intra-Theater Communications
Page 114 and 115: 4. Projector SPB designs shall not
Page 116 and 117: the event, and zero all Critical Se
Page 118 and 119: window) shall be UTC.Security Manag
Page 120 and 121: . The SM shall independently authen
Page 122 and 123: 6. No broadcast RRP commands shall
Page 124 and 125: Functions of the Security Manager (
Page 126 and 127: Note: DCI reserves the right, at so
Page 128 and 129: • Is required to survive camcorde
Page 130 and 131: • Log Data - Security event infor
Page 132 and 133: using the GetEventList and GetEvent
Page 134 and 135: failure) per Section 9.6.1.3 Digita
Page 136 and 137: • Secure Silicon -Sensitive data
Page 138 and 139: secure silicon chip, input/output s
Page 140 and 141: FIPS 140-2 level 3 devices provide
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to the appropriate Section 9.4.5.2.
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those under the control of the Secu
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Security Managers (SMs) other than
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The above RSA asymmetric protection
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CPRL Acronym for Component Position
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LTCMain TitlesMBMDMEMetadataMTBFMXF
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TDLTimed TextTLMTLSTMSTrack FileUDP
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DCI Specs - Digital Cinema Initiatives

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