The global defense cybersecurity market size was estimated at USD 30.49 billion in 2024 and is projected to reach USD 78.85 billion by 2033, growing at a CAGR of 11.4% from 2025 to 2033. The growth is attributed to the increasingly investing in cybersecurity by nation-states, defense agencies, and militaryto counter a growing wave of nation-sponsored cyberattacks, zero-day exploits, and advanced persistent threats (APTs).

Modern defense cybersecurity strategies are shifting from perimeter-based security to layered architectures that emphasize network segmentation, threat intelligence sharing, and resilient systems architecture. For instance, agencies are integrating multi-domain security frameworks that protect traditional IT infrastructure along with operational technologies (OT), military-grade communications, and weapon systems from cyber infiltration. Consequently, as hybrid warfare and cyber espionage become standard tactics, governments are prioritizing military-specific cybersecurity standards, red-teaming exercises, and scenario-based threat modeling to enhance national cyber defense readiness.

Additionally, governments across regions are significantly increasing defense cybersecurity budgets in response to escalating cyber conflicts and digital warfare risks. A growing trend is the formalization of cyber resilience frameworks that embed security across the entire weapon system lifecycle. Moreover, defense agencies are also aligning cybersecurity with mission assurance by mandating modular, standards-driven approaches that support continuous assessment, secure-by-design architectures, and adaptable threat mitigation. These efforts reflect a shift toward collating cybersecurity not as a compliance checkbox, but as a critical performance attribute.

For instance, in December 2024, the U.S. Department of Defense released Version 4.3 of its Cyber Resilient Weapon Systems (CRWS) Body of Practice, an updated online reference guide that helps defense programs implement cyber resilience measures across complex weapon systems. This provides revised practices, DoD-specific guidance, and improved navigation features, reinforcing the growing emphasis on scalable, threat-informed defense cybersecurity integration. In conclusion, as the threat landscape becomes more complex, the market is rapidly evolving to incorporate predictive, automated, and resilience-driven defense capabilities.