NAVSO P-5239-22, PROTECTED DISTRIBUTION SYSTEM (PDS) GUIDEBOOK, MODULE 22 INFORMATION SYSTEMS SECURITY

NAVSO P-5239-22, PROTECTED DISTRIBUTION SYSTEM (PDS) GUIDEBOOK, MODULE 22 INFORMATION SYSTEMS SECURITY (INFOSEC) PROGRAM GUIDELINES (OCT 1997)., This guidebook applies to Department of the Navy activities which use, or are contemplating the use of a PDS to protect the transmission of unencrypted classified National Security Information (NSI). This guidebook describes the requirements for a PDS installed within the U.S. (including its territories and possessions) and within LOW and MEDIUM threat locations outside the United States as described by reference (b). The threat within the U.S. is LOW. The use of a PDS within a HIGH or CRITICAL threat location (per reference (b)) is not recommended. If a PDS is used in these location, protection techniques are determined on a case-by-case basis by the cognizant Approval Authority.