{
  "url": "https://openlegislation.uk/eu-decision-2019-425/schedule-ANNEX II/division-3./division-3.2.",
  "json_url": "https://openlegislation.uk/eu-decision-2019-425/schedule-ANNEX II/division-3./division-3.2..json",
  "legislation": "eudn/2019/425",
  "legislation_title": "Council Decision (EU) 2019/425 of 12 March 2019 on the position to be taken on behalf of the European Union within the Joint Committee established by the Agreement between the European Union and the Kingdom of Norway on administrative cooperation, combating fraud and recovery of claims in the field of value added tax",
  "legislation_url": "https://openlegislation.uk/eu-decision-2019-425",
  "path": "schedule/ANNEX II/division/3./division/3.2.",
  "kind": "division",
  "number": "3.2",
  "heading": "CCN/CSI SERVICE DEFINITION AND CHARACTERISTICS",
  "text": "The Common Communication Network / Common System Interface is a tool for exchange of tax information between the National Administrations in the field of Taxation and Anti-Fraud. The main characteristics of the CCN/CSI system infrastructure are listed hereafter:\nTable 5\nCharacteristics of the services provided by CCN/CSI\nTRANS-EUROPEAN\nCCN/CSI offers a global WAN access to Service Requesters through a number of Points of Presence (PoP) in every Member State, acceding countries and the Kingdom of Norway. The CCN/CSI network backbone offers the required capacity and resilience to provide the Service Requesters with a high availability rate.\nMULTI-PLATFORM\nAllows the interoperability between heterogeneous platforms (Windows, Linux, Solaris, AIX, HPUX, SVR4, IBM MVS, etc.) through a highly portable communication stack (CSI) installed on standard national Application Platforms.\nMULTI-PROTOCOL\nSupports various protocols and exchange paradigms:\nCSI protocol supporting asynchronous and synchronous (request/response) communication paradigms (CCN/CSI channel);\nHTTP/S protocol for interactive access to CCN Intranet services (CCN Intranet channel);\nPOP, IMAP, SMTP protocols for the exchange of e-mail between NA users but also between applications (CCN Mail III channel).\nSECURE\nInformation exchanges over the CCN/CSI network are protected to ensure optimal confidentiality and data integrity. Security services include:\nSite-to-site IPSec256-bits encryption and protection against unwanted accesses enforced by Firewall/encryption devices deployed at every CCN/CSI site;\nAccess control mechanisms (authentication, authorisation, accounting) at site level enforced at CCN Gateway and supported by local administration tools (ADM3G);\nSession-level security enforced by message-level encryption (CSI secure), SSL v.3 mutual authentication and encryption (HTTPS), POP-S and IMAP-S (secure e-mail transport).\nMANAGED\nThe CCN/CSI infrastructure also provides Service Requesters with managed services including:\nCentral Monitoring;\nEvent logging;\nProduction of statistics on CSI and CCN Mail III message exchanges (size, number of messages, matrix) and statistics on CCN gateways and CCN Mail III;\nUser management (ADM3G) and directory services;\nCSI stacks validation;\nPortal services:\nCCN Portal: on-line access to statistics, on-line remote API proxies (RAP) management;\nITSM Portal: on-line Newsletter, on-line documentation and CSI stack packages, CCN Frequently Asked Questions (FAQ);\nACT (Application Configuration Tool);\nServices calls tracking and on-line support.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2019/425/schedule/ANNEX II/division/3./division/3.2.",
    "retrieved_at": "2026-11-01T15:12:47.334120+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}