Committee on National Security Systems Instruction No. 4009,National Information Assurance Glossary, published by theUnited States federal government, is an unclassifiedglossary ofInformation security terms intended to provide a common vocabulary for discussingInformation Assurance concepts.
The glossary was previously published as theNational Information Systems Security Glossary (NSTISSI No. 4009) by the National Security Telecommunications and Information Systems Security Committee (NSTISSC). Under Executive Order (E.O.) 13231 of October 16, 2001,Critical Infrastructure Protection in theInformation Age, the PresidentGeorge W. Bush redesignated the National Security Telecommunications and Information Systems Security Committee (NSTISSC) as the Committee on National Security Systems (CNSS).
The most recent version was revised April 26, 2010.[1]