The IEC 62443 framework is a set of international standards developed to ensure the cybersecurity of industrial automation and control systems (IACS). These standards were created by the International Society of Automation (ISA) and the International Electrotechnical Commission (IEC) to address security challenges in industrial sectors.

• Protect industrial systems: Ensure the security and integrity of automation and control systems against cyber threats.
• Establish best practices: Provide guidelines and requirements to implement and maintain secure industrial systems.
• Facilitate compliance: Help organizations comply with cybersecurity regulations and improve their operational resilience.

The framework applies to a wide range of industrial sectors that use automation and control systems, including:

• Energy: Electricity generation and distribution.
• Chemical industry: Production and management of chemicals.
• Industrial automation: Control systems for manufacturing and production.
• Transportation: Control systems for transportation infrastructure.

• Risk management: Identification and mitigation of cybersecurity risks in industrial systems.
• Product lifecycle security: Requirements for the secure development of products, including design, development, testing, and maintenance.
• Security assessment: Procedures for assessing and certifying the security of industrial systems and components.
• Communication protection: Measures to ensure the security of communications between various components of industrial systems.

The IEC 62443 framework was developed and published in several parts over the years, with periodic updates to reflect new threats and technologies. The series of standards is globally recognized and is continuously updated to maintain its relevance and effectiveness.
Original document here: IEC 62443