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·         Información clasificada

Técnicamente no es un nivel de clasificación, pero es usado por los documentos gubernamentales que no poseen una de las clasificaciones presentadas arriba.

http://es.wikipedia.org/wiki/Informaci%C3%B3n_clasificada

Information that has not been determined pursuant to E.O. 12958, as amended, or any predecessor order, to require protection against unauthorized disclosure and that is not designated as classified. [CNSSI_4009:2010]

Technically not a classification level; but this is a feature of some classification schemes, used for government documents that do not merit a particular classification. This is because the information is low-impact, and therefore does not require any special protection, such as vetting of personnel.

Unclassified is a security classification assigned to official information that does not warrant the assignment of Confidential, Secret, or Top Secret markings but which is not publicly-releasable without authorization.

http://www.fas.org/sgp/eprint/bagley.html

Techniquement, ce n'est pas une classification, mais ce niveau est utilisé pour les documents gouvernementaux dont le niveau de sensibilité ne correspond pas à une des classifications ci-dessus. Ces documents peuvent être lus sans avoir une habilitation spécifique.

http://fr.wikipedia.org/wiki/Information_classifi%C3%A9e