DCI Specs - Digital Cinema Initiatives

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