US Government has published cybersecurity framework for critical infrastructure, a living document to improve internal security. The goal is to improve IT and SCADA networks deployed in sensitive industries such as energy, water and financial services. Cybersecurity threats exploit the increased complexity and connectivity of critical infrastructure systems, placing the Nations security, economy, and public safety and health at risk. The framework is the work subsequent the Executive Order 13636, Improving Critical Infrastructure Cybersecurity, on February 12, 2013, which established that [i]t is the Policy of the United States to enhance the security and resilience of the.”]
Source: https://securityaffairs.co/wordpress/22180/security/nist-critical-infrastructure.html