Communications securityCommunications security
): Measures and controls taken to deny unauthorized persons information
derived from telecommunications and ensure the authenticity of such telecommunications.
Note: Communications security includes cryptosecurity, transmission security, emission security, and physical security of COMSEC material.
- cryptosecurity: The component of communications security that results from the provision of technically sound cryptosystems and their proper use.
- emission security: Protection resulting from all measures taken to deny unauthorized persons information of value which might be derived from intercept and analysis of compromising emanations from crypto-equipment, AIS, and telecommunications systems.
- physical security: The component of communications security that results from all physical measures necessary to safeguard classified equipment, material, and documents from access thereto or observation thereof by unauthorized persons.
- transmission security: The component of communications security that results from the application of measures designed to protect transmissions from interception and exploitation by means other than cryptanalysis.
Source: from Federal Standard 1037C
and from MIL-STD-188
and from the National Information Systems Security Glossary
and from the Department of Defense Dictionary of Military and Associated Terms