generated: '2026-07-27' method: generated source: >- https://www.smartdcc.co.uk/media/sn5dn4hr/information-security-policy-3.pdf (abbreviations table) + https://github.com/SmartDCCInnovation READMEs + smartdcc.co.uk product and governance pages note: >- Every term below is expanded exactly as Smart DCC or the Smart Energy Code expands it in a published source. Definitions are written from those sources; nothing here is invented. This is the working vocabulary a developer needs to read DUIS, GBCS and the Smart Energy Code documents. terms: - term: DCC expansion: Data Communications Company definition: Smart DCC Ltd, the Ofgem-licensed operator of Britain's national smart metering communications network. A wholly owned subsidiary of Capita plc. source: https://www.smartdcc.co.uk/about-dcc/ - term: DUIS expansion: DCC User Interface Specification definition: The XML interface specification that defines how DCC Users send service requests to, and receive responses and alerts from, the DCC. Designated as SEC Appendix AD; V5.3 dated 18 March 2025. source: https://smartenergycodecompany.co.uk/documents/sec-subsidiary-documents/sec-appendix-ad-dcc-user-interface-specification-duis/ - term: DUIS Code of Connection expansion: DCC User Interface Code of Connection definition: SEC Appendix AE — the conditions a DCC User must meet to connect to the DCC User Interface. source: https://smartenergycodecompany.co.uk/documents/sec-subsidiary-documents/sec-appendix-ae-dcc-user-interface-code-of-connection/ - term: GBCS expansion: Great Britain Companion Specification definition: The specification governing the message format exchanged with smart metering devices; carried as a payload inside DUIS responses and may be encrypted when it holds sensitive data. source: https://github.com/SmartDCCInnovation/gbcs-parser - term: SMETS1 expansion: Smart Metering Equipment Technical Specification version 1 definition: First-generation smart meters, enrolled and adopted onto the DCC network through the SMETS1 Enrolment and Adoption programme. source: https://www.smartdcc.co.uk/our-smart-network/current-programmes/smets1-enrolment-and-adoption/ - term: SMETS2 expansion: Smart Metering Equipment Technical Specification version 2 definition: Second-generation smart meters, natively interoperable on the DCC network. source: https://www.smartdcc.co.uk/news-events/20-million-second-generation-meters-now-connected-to-our-network/ - term: SMKI expansion: Smart Metering Key Infrastructure definition: The public key infrastructure that issues the organisation and device certificates used to sign and encrypt smart metering traffic. Key material is PEM-encoded X.509 with EC prime256v1 private keys in PKCS#8 format. source: https://github.com/SmartDCCInnovation/dccboxed-signing-tool - term: ZAZ1 expansion: null definition: A self-contained test PKI for UK smart meter devices, used by DCC Boxed and any smart energy devices attached to it. Its certificates and private keys are published openly for testing. source: https://github.com/SmartDCCInnovation/dccboxed-keystore - term: SEC expansion: Smart Energy Code definition: The multiparty industry code governing end-to-end smart metering, under which DUIS and its companion documents are designated. source: https://smartenergycodecompany.co.uk/the-smart-energy-code/ - term: REC expansion: Retail Energy Code definition: The industry code governing the operation of the retail energy market; named alongside the SEC and the Licence in the scope of DCC's Information Security Policy. source: https://www.smartdcc.co.uk/media/sn5dn4hr/information-security-policy-3.pdf - term: Licence expansion: Smart Meter Communication Licence definition: The Ofgem-granted licence under which Smart DCC operates the national smart metering communications network. source: https://www.smartdcc.co.uk/about-dcc/governance-regulations/smart-dcc-licence-regulation/ - term: DCC Boxed expansion: null definition: An Intel NUC-based test appliance that emulates the end-to-end smart metering network, aligned with the November 2023 SEC release with all device SRVs supported. source: https://www.smartdcc.co.uk/our-smart-network/network-products-services/dcc-boxed/ - term: GFI expansion: null definition: A Smart DCC test tool that predates DCC Boxed and ships the same ZAZ1 test certificates and private keys. source: https://www.smartdcc.co.uk/our-smart-network/network-products-services/gfi/ - term: ITCH expansion: Instrumented Test Communications Hub definition: A test communications hub available as an ancillary component for DCC Boxed (Wired ITCH). source: https://www.smartdcc.co.uk/our-smart-network/network-products-services/dcc-boxed/ - term: SRV expansion: Service Request Variant definition: The identifier of a DUIS service request, for example SRV 4.1.1 (read current energy usage), SRV 1.1.1 (ESME tariff) and SRV 2.2 (Top Up Device). source: https://github.com/SmartDCCInnovation/dccboxed-nodered-nodes - term: EUI expansion: Extended Unique Identifier definition: The 16-hexadecimal-character identifier used for the DUIS Originator (sending Remote Party) and Target (end device or ACB), and as the primary key of the DCC Boxed keystore. source: https://github.com/SmartDCCInnovation/dccboxed-keystore - term: ACB expansion: Access Control Broker definition: A remote party addressable as a DUIS Target; its digital signature certificate is one of the certificates commonly added to a DCC Boxed keystore. source: https://github.com/SmartDCCInnovation/dccboxed-keystore - term: I99 expansion: null definition: The DUIS synchronous acknowledgement returned for a device command, before the asynchronous device response arrives. source: https://github.com/SmartDCCInnovation/dccboxed-nodered-nodes - term: I0 expansion: null definition: The later, asynchronous DUIS response carrying the actual result of a device command. source: https://github.com/SmartDCCInnovation/dccboxed-nodered-nodes - term: UTRN expansion: Unique Transaction Reference Number definition: A prepayment top-up token; it can be generated and submitted programmatically with service request 2.2 (Top Up Device) or entered manually on a meter. source: https://github.com/SmartDCCInnovation/dccboxed-nodered-nodes - term: RTDS expansion: null definition: The source of the DUIS request templates published in @smartdcc/duis-templates. source: https://github.com/SmartDCCInnovation/duis-templates - term: HAN expansion: Home Area Network definition: The local device network in a premises; the DCC Boxed HAN page lists the EUIs of attached devices. source: https://github.com/SmartDCCInnovation/dccboxed-nodered-nodes - term: PPMID expansion: Prepayment Meter Interface Device definition: A HAN device that can be pair-wise joined with an ESME. source: https://github.com/SmartDCCInnovation/dccboxed-nodered-nodes - term: ESME expansion: Electricity Smart Metering Equipment definition: The electricity smart meter; target of tariff commands such as SRV 1.1.1. source: https://github.com/SmartDCCInnovation/dccboxed-nodered-nodes - term: ECoS expansion: Enduring Change of Supplier definition: A DCC programme delivering the enduring arrangements for change of energy supplier. source: https://www.smartdcc.co.uk/our-smart-network/current-programmes/enduring-change-of-supplier-ecos/ - term: MHHS expansion: Market-wide Half-Hourly Settlement definition: The industry programme moving electricity settlement to half-hourly data market-wide. source: https://www.smartdcc.co.uk/our-smart-network/current-programmes/market-wide-half-hourly-settlement/ - term: DSP expansion: Data Service Provider definition: The provider of DCC's central data services; the subject of the DSP programme. source: https://www.smartdcc.co.uk/our-smart-network/current-programmes/data-service-provider-dsp-programme/ - term: CSS expansion: Central Switching Service definition: The energy supplier switching service operated by DCC; Ofgem confirmed in 2024 that it stays with DCC. source: https://www.smartdcc.co.uk/news-events/ofgem-confirms-successful-switching-service-to-stay-with-dcc/ - term: DFS expansion: Demand Flexibility Service definition: A National Grid ESO programme the DCC network supports. source: https://www.smartdcc.co.uk/enabling-innovation/what-is-the-demand-flexibility-service-dfs/ - term: TAD expansion: Testing Approach Document definition: The document consulted on ahead of each June and November SEC release, setting out how the release will be tested. source: https://www.smartdcc.co.uk/consultations/ - term: SVTAD expansion: SEC Variation Testing Approach Document definition: The testing approach document for a SEC variation. source: https://www.smartdcc.co.uk/consultations/ - term: S1SR expansion: SMETS1 Supporting Requirements definition: The designated SEC subsidiary document carrying SMETS1 supporting requirements, amended through public consultation. source: https://www.smartdcc.co.uk/consultations/ - term: ISMS expansion: Information Security Management System definition: The management system defined within ISO/IEC 27001 and described in the DCC ISMS Manual. source: https://www.smartdcc.co.uk/media/sn5dn4hr/information-security-policy-3.pdf - term: CISO expansion: Chief Information Security Officer definition: The role accountable for the DCC Information Security Policy and for maintaining compliance with it. source: https://www.smartdcc.co.uk/media/sn5dn4hr/information-security-policy-3.pdf - term: NIST CSF expansion: NIST Cybersecurity Framework definition: The threat-led framework, at version 2.0, that the DCC Security Architecture Framework is aligned to and mapped onto ISO/IEC 27001:2022. source: https://www.smartdcc.co.uk/media/sn5dn4hr/information-security-policy-3.pdf - term: Category 1 incident expansion: null definition: >- An incident which, in the reasonable opinion of the DCC, prevents a large group of DCC Service Users from using the DCC Service User Systems, has a critical adverse impact on the activities of the DCC, causes significant financial loss and/or disruption to the DCC, or results in any material loss or corruption of DCC data. Published monthly. source: https://www.smartdcc.co.uk/major-incident-management/