Data security: Classification according to the Traffic Light Protocol (TLP)

Data security is a major concern for Wiener Linien. That is why, in August 2020, we introduced a classification system for all company data based on the Traffic Light Protocol (TLP). The Traffic Light Protocol is a simple, internationally recognised method for classifying information according to its level of confidentiality.

This means that all documents and emails are given a confidentiality rating according to the following classification.

⚪ TLP CLEAR Public Unrestricted dissemination Information may be published without restriction; copyrighted content is excluded from this classification.
🟢 TLP GREEN Internal Disclosure only within the Wiener Stadtwerke Group and to external interested parties (e.g. partners)

Information at this TLP level may be disclosed within the Wiener Stadtwerke Group and to external interested parties. However, publication of the information is not permitted.
🟡 TLP AMBER Confidential Disclosure according to the ‘need-to-know’ principle

Information marked as TLP:AMBER may only be disclosed internally or externally on a need-to-know basis. Recipients may disclose information to third parties on the same need-to-know basis if the recipients are seeking to protect themselves or reduce damage.
🟡 TLP AMBER+ STRICT Confidential Disclosure according to the principle of ‘need to know’ and only within the group company

Information may only be disclosed internally within Wiener Linien according to the principle of ‘need to know’. Recipients may disclose information within Wiener Linien according to the same principle of necessity if this is done with the aim of protecting Wiener Linien or reducing damage to Wiener Linien.
🔴 TLP RED Strictly confidential Disclosure only for specific purposes and directly to known recipients (sensitive)

In the case of information marked as TLP:RED, unauthorised access must be prevented under all circumstances. Disclosure may only take place after approval by the document owner/information owner and must be recorded in a traceable manner, e.g. by email.

Please support our security requirements by treating information received from us (documents, emails) in accordance with the classification notice. 

You can, of course, also specify the level of confidentiality with which we should treat your information by including a classification notice with your correspondence to us.

Wiener Linien Customer Service

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