Which body developed the ISA/IEC 62443 standards?

The ISA/IEC 62443 standards were developed by the International Society of Automation (ISA) in collaboration with the International Electrotechnical Commission (IEC). This partnership was formed to address the need for a comprehensive cybersecurity framework specific to Industrial Automation and Control Systems (IACS).

The ISA is known for its focus on automation practices and safety, while the IEC is a prominent international standards organization that develops and publishes international standards for electrical, electronic, and related technologies. The collaboration between these two organizations ensures that the standards incorporate both the technical and operational aspects of cybersecurity in industrial environments.

The other options are not correct because the ISO is a separate entity that focuses on a wide range of standards across various industries but does not specifically handle the ISA/IEC 62443 framework. Similarly, NIST provides guidelines and frameworks for cybersecurity but is not involved in the specific development of the ISA/IEC 62443 standards. IEEE, while influential in developing electrical and electronic standards, does not have a direct role in the ISA/IEC 62443 framework.