<h1>Critical information infrastructure security: stakeholders commit to trusted supply chains and enhanced regulatory collaboration for national resilience.</h1> Securing critical information infrastructure is a strategic priority focused on five operative areas: strengthening the national cybersecurity ecosystem, securing digital supply chains, improving intersectoral collaboration to protect essential services, enhancing regulatory frameworks, and revising procurement to prioritise trust. The Delhi Declaration on Secure and Trusted Digital Infrastructure commits participants to supply-chain transparency and resilience, technological self-reliance, enhanced public-private cooperation, regulatory harmonisation, and institutional measures such as senior security leadership to protect key sectors and national resilience.