Transcription of SECURITY CATEGORIZATION AND CONTROL SELECTION …
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1 CNSSI No. 1253 27 March 2014 SECURITY CATEGORIZATION AND CONTROL SELECTION FOR NATIONAL SECURITY SYSTEMS THIS INSTRUCTION PRESCRIBES MINIMUM STANDARDS YOUR DEPARTMENT OR AGENCY MAY REQUIRE FURTHER IMPLEMENTATION CNSSI No. 1253 i NATIONAL MANAGER FOREWORD 1. The Committee on National SECURITY Systems (CNSS) Instruction No. 1253, SECURITY CATEGORIZATION and CONTROL SELECTION for National SECURITY Systems, provides all Federal Government departments, agencies, bureaus, and offices with guidance on the first two steps of the Risk Management Framework (RMF), Categorize and Select, for national SECURITY systems (NSS).
Overlays are intended to address additional factors (beyond impact) or diverge from the assumptions used to create the security control baselines (see Section 2.2), the use of which is determined by answering the applicability questions in each overlay. Overlays are baseline independent, meaning that they can be applied to any NSS baseline (e.g.,
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