Primary definition
Missions to preserve the ability to utilize one's own network capabilities and protect data, computers, cyberspace-enabled devices, and other designated systems by defeating ongoing or imminent malicious cyberspace activity. Also called DCO.
Also known asDCO · cyber defense operations · network defense operations · cybersecurity operations · active cyber defense
1 sources cited4 related termsReviewed Aug 10, 2026
— March 2020 CSC ReportView source
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M2CR
Missions to preserve the ability to utilize one's own network capabilities and protect data, computers, cyberspace-enabled devices, and other designated systems by defeating ongoing or imminent malicious cyberspace activity. Also called DCO.
March 2020 CSC Report · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Defensive Cyber Operations. In Election Security Glossary. Retrieved August 13, 2026, from https://electionsecurityglossary.com/glossary/defensive-cyber-operations
Sources
1 cited · last checked Aug 10, 2026
01
March 2020 CSC Report
March 2020 CSC Report
Single-source
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