Strategic Applications of Just War Theory in Cyberspace: Navigating Challenges and Expectations for Responsible State Behavior

Just War Theory provides a foundational ethical and legal framework for evaluating the legitimacy of armed conflict. However, its application to cyberspace presents challenges rooted in the underlying assumptions of kinetic warfare that shape its traditional interpretation. Cyber operations often unfold without clear attribution, occur at high speed, and impact dual-use infrastructure where civilian and military systems intersect. These characteristics disrupt traditional applications of jus ad bellum and jus in bello, particularly the principles of legitimate authority, discrimination, proportionality, and military necessity. The growing role of non-state actors, the asymmetry of cyber capabilities, and the global interdependence of digital infrastructure further complicate ethical and legal analysis. This article revisits classical just war principles and evaluates their applicability to the digital domain through contemporary case studies and legal scholarship. It proposes a Cyber Conflict Assessment Framework (CCAF) to support preliminary ethical and legal assessments of cyber operations. The framework integrates traditional just war principles with cyber-specific indicators, offering structured guidance for norm development, policy formation, and operational risk assessment. By fostering ethical coherence and legal accountability in cyberspace, the article contributes to ongoing efforts to uphold a rules-based international order in the context of modern conflict.