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Protective Distribution System

Definition(s):

  Wire line or fiber optic system that includes adequate safeguards and/or countermeasures (e.g., acoustic, electric, electromagnetic, and physical) to permit its use for the transmission of unencrypted information.
Source(s):
NIST SP 800-18 Rev. 1
NIST SP 800-53 Rev. 4 [Superseded]