DCI Specs - Digital Cinema Initiatives

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which TLS-based authentication alone cannot do. At the time of installation the authorityfigure can provide visual inspection of the projector to assure it has not been tamperedwith.Once a projector is installed, the state of marriage is permanent (and monitored) until theauthority figure decides to separate the two SPBs (for whatever reason). In addition, thisspecification establishes logging requirements surrounding projector installation andmaintenance functions that record security-critical event information.It is mandatory that a projection system installation includes the marriage function perSection 9.4.3.6 Functional Requirements for Secure Processing Block Systems (notingthe permanently married exception provided for in that section). The marriage processshall require the supervision of a human authority figure, who shall examine projectorsas part of the marriage process to assure the associated SPB has not been tamperedwith.9.4.3. Theater Security OperationsThis section describes how equipment conforming to the security system is used in normaltheater operations. The show, expressed in a Show Playlist, consists of exhibition-arrangedsequences of compositions, any of which may be encrypted. One or more Rights Ownersmay supply Key Delivery Message(s) (KDMs) to provide all the content keys required for theShow Playlist.With respect to security, theater operations break down into four categories:1. Secure communications establishment and Secure Processing Block (SPB) deviceauthentication2. Pre-show preparations3. Playback4. Post playbackThe SMS is generally responsible for initiating activity within each category, except the last.9.4.3.1. Transport Layer Security (TLS) Establishment and SecureProcessing Block (SPB) AuthenticationExhibition has the liberty to power their equipment up and down as desired. However,the Security Managers (SM) must authenticate the equipment within their respectivesuites, and establish secure Transport Layer Security (TLS) sessions with each remoteSPB with each power-on.Note that the establishment of each TLS session enables the SM to authenticate theother party (SPB or SMS) to the session and provides for secure ITM communicationswithin the auditorium. The SM does not “trust” such party for security functions related tocontent playback, unless the identity of the party appears on the Trusted Device List(TDL) delivered in the Key Delivery Message (KDM) for that particular CompositionPlaylist (CPL) (see Section 9.4.3.5 Functions of the Security Manager (SM) and Section9.8 Digital Certificate, Extra-Theater Messages (ETM), and Key Delivery Messages(KDM) Requirements). Thus, device authentication and secure communications occursindependently of “trust”; the former being an exhibition equipment/infrastructure securityissue, the latter being specific to a Rights Owner and a composition. Where content isnot encrypted and no KDM/TDL exists, the SM does not invoke trust control.DCI Digital Cinema System Specification v.1.2 Page 104
The flow chart in Figure 16: System Start-Up Overview, is an example of how a systemstart-up may occur. This flow chart is informative. There are other designs that may havedifferent steps or different sequences that will accomplish the same result and meet therequirements of this specification.Figure 16: System Start-Up Overview9.4.3.2. Pre-show PreparationsPre-show preparations include tasks to be performed (well) in advance of show time toensure adequate lead-time to resolve any issues that might impact the compositionshowing. These preparations do not prepare an auditorium for a showing, but aredesigned to provide assurance that all prerequisites for a specific showing have beensatisfied.• Composition Playlist (CPL) check(s) – Composition Playlists (CPL) shallbe validated by the Security Manager participating in the respectivecomposition playback.• Composition decryption preparations – Each encrypted composition willhave associated with it a Key Delivery Message (KDM), carrying time windowconstraints, decryption keys, and a Trusted Device List (TDL). The SMS,DCI Digital Cinema System Specification v.1.2 Page 105
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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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5.2.2.3. InteroperableThe Packaging
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Figure 6: Example Show PlaylistThe
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Length (Value Length), followed by
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which it was stopped or paused. It
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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 92 and 93: • Essence Encryption and Cryptogr
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 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
Page 142 and 143: to the appropriate Section 9.4.5.2.
Page 144 and 145: those under the control of the Secu
Page 146 and 147: Security Managers (SMs) other than
Page 148 and 149: The above RSA asymmetric protection
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Page 152 and 153: 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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