This article is about areas of classified information and document classification. For operation of traffic signalling devices, see traffic-light signalling and operation. For other uses, see Traffic light (disambiguation).
The Traffic Light Protocol (TLP) is a system for classifying sensitive information created in the early 2000s by the UK Government's National Infrastructure Security Co-ordination Centre, in order to encourage greater sharing of sensitive information.[1]
The fundamental concept is for the originator to signal how widely they want their information to be circulated beyond the immediate recipient. It is designed to improve the flow of information between individuals, organizations or communities in a controlled and trusted way. It is important that everyone who handles TLP-labeled communications understands and obeys the rules of the protocol. Only then can trust be established and the benefits of information sharing realized. The TLP is based on the concept of the originator labeling information with one of four colors to indicate what further dissemination, if any, can be undertaken by the recipient. The recipient must consult the originator if wider dissemination is required.
A number of current specifications for TLP exist.
From ISO/IEC, as part of the Standard on Information security management for inter-sector and inter-organizational communications[2]
From US-CERT, which is intended to provide a publicly available simple definition[3]
From the Forum of Incident Response and Security Teams (FIRST), which published version 1.0 of its consolidated TLP document on August 31, 2016.[4] arising from a Special Interest Group it created to ensure that interpretations of TLP are consistent, and clear expectations exist across user communities. FIRST deprecated version 1.0 in August 2022 (though may still be used until 31 December 2022[5]), on the release of version 2.0.[6]
^Eric Luiijf; Allard Kernkamp (March 2015). "Sharing Cyber Security Information" (PDF). Global Conference on CyberSpace 2015. Toegepast Natuurwetenschappelijk Onderzoek. Retrieved 2016-10-25. Don Stikvoort (11 November 2009). "ISTLP - Information Sharing Traffic Light Protocol" (PDF). Trusted Introducer. National Infrastructure Security Co-ordination Centre. Retrieved 2016-10-25. "Development of Policies for Protection of Critical Information Infrastructures" (PDF). Organisation for Economic Co-operation and Development. Retrieved 2015-11-19. "'Re: OpenSSH security advisory: cbc.adv' - MARC". Mailing list ARChive. Retrieved 2012-11-25. (alt source SecurityFocus archive entry)
^"ISO/IEC 27010:2015 [ISO/IEC 27010:2015] | Information technology — Security techniques — Information security management for inter-sector and inter-organizational communications". International Organization for Standardization/International Electrotechnical Commission. November 2015. Retrieved 2019-12-31.
^"Traffic Light Protocol (TLP) Definitions and Usage". United States Department of Homeland Security. Retrieved 2019-12-31.
^"FIRST announces Traffic Light Protocol (TLP) version 1.0". Forum of Incident Response and Security Teams. Retrieved 2019-12-31.
^"Traffic Light Protocol (TLP)". FIRST — Forum of Incident Response and Security Teams. Retrieved 2022-08-05.
^"FIRST announces Traffic Light Protocol (TLP) version 2.0" (PDF).
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