Cybersecurity

High Consensus

Defend Forward

Primary definition

The proactive observing, pursuing, and countering of adversary operations and imposing of costs in day-to-day competition to disrupt and defeat ongoing malicious adversary cyber campaigns, deter future campaigns, and reinforce favorable international norms of behavior, using all of the instruments of national power. This is a reimagining and expansion of the defend forward concept as initially conceived of in the 2018 DoD Cyber Strategy, which focuses solely on the military instrument.

Also known asactive defense · persistent engagement · forward defense · proactive cyber defense · cyber persistence
2 sources cited4 related termsReviewed Aug 10, 2026
March 2020 CSC ReportView source

Understand more election terms clearly

Get one important election term explained each week, with authoritative sources, practical context and related definitions.

Free. One useful email each week. Unsubscribe anytime.Learn more about the ESG newsletter →
M2CR

High consensus

The proactive observing, pursuing, and countering of adversary operations and imposing of costs in day-to-day competition to disrupt and defeat ongoing malicious adversary cyber campaigns, deter future campaigns, and reinforce favorable international norms of behavior, using all of the instruments of national power. This is a reimagining and expansion of the defend forward concept as initially conceived of in the 2018 DoD Cyber Strategy, which focuses solely on the military instrument.

March 2020 CSC Report · 2024

Cite this term

Permanent URL · stable across revisions
Election Security Glossary. (2026). Defend Forward. In Election Security Glossary. Retrieved August 20, 2026, from https://electionsecurityglossary.com/glossary/defend-forward

Sources

2 cited · last checked Aug 10, 2026

01

March 2020 CSC Report
March 2020 CSC Report

High consensus

View source

02

The Cyber Glossary
The Cyber Glossary

High consensus

View source

Get the weekly election term

Receive one cited, source-backed election explanation in your inbox each week.

Get election terms explained weekly →
Free · Nonpartisan · Unsubscribe anytime.
Continue Research

Keep going from here

Three ways to go deeper on cybersecurity and adjacent terminology.