Spillage of classified information

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Spillage of classified information is a contamination of lower level systems with material of a higher classification.

The formal definition by the US Government is found in[1] as: "Security incident that results in the transfer of classified or CUI information onto an information system not accredited (i.e., authorized) for the appropriate security level."


  1. ^ CNSSI No. 4009 "National Information Assurance (IA) Glossary", Page 70, 26 April 2010