# Council Decision of 23 September 2013 on the security rules for protecting EU classified information (2013/488/EU), Division 2: The following IA properties and concepts are essential for the security and correct functioning of operations on CIS:

Extent: E+W+S+N.I.

Authenticity the guarantee that information is genuine and from bona fide sources;
Availability the property of being accessible and usable upon request by an authorised entity;
Confidentiality the property that information is not disclosed to unauthorised individuals, entities or processes;
Integrity the property of safeguarding the accuracy and completeness of information and assets;
Non-repudiation the ability to prove an action or event has taken place, so that this event or action cannot subsequently be denied.

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Source: https://www.legislation.gov.uk/eudn/2013/488/annex/IV/division/I/division/2 (the official version)
Page: https://openlegislation.uk/eu-decision-2013-488/annex-IV/division-I/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.