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Welcome to Clas 1-99
NSTISSAM INFOSEC/1-99
https://www.cnss.gov/Assets/pdf/nstissam_infosec_1-99.pdf
The meaning of CLAS 1-99: Adm Rogers teaching on Nazi infiltration into America
1. National_Security_Directive_42_5_July_1990.pdf
2. NSTISSAM_INFOSEC_1_99_July_1999.pdf
Welcome to Clas 1-99
NSTISSAM INFOSEC/1-99
https://www.cnss.gov/Assets/pdf/nstissam_infosec_1-99.pdf
The meaning of CLAS 1-99: Adm Rogers teaching on Nazi infiltration into America
1. National_Security_Directive_42_5_July_1990.pdf
2. NSTISSAM_INFOSEC_1_99_July_1999.pdf
Discusses the "insider threat" to government information systems containing unclassified, classified, and mission-critical information, and how to mitigate against that.
In other words not a hacker breaking into a secured area or system, but a person authorized to have access, who behaves in an untrustworthy manner. INFILTRATION.