What is the difference between IEC 62443-4-1 and IEC 62443-4-2?
IEC 62443-4-1 and IEC 62443-4-2 are both parts of the IEC 62443 series that focus on the security of industrial automation and control systems (IACS), but they have different scopes and focus areas.
IEC 62443-4-1 provides guidelines for the secure development of software used in IACS. It covers the entire software development lifecycle, from design and implementation to testing and maintenance. The standard outlines the security requirements for each phase of the development process and provides recommendations for secure coding practices, testing, and vulnerability management.
On the other hand, IEC 62443-4-2 provides guidelines for the security of network-connected devices and systems used in IACS. It covers the requirements for the secure deployment and configuration of devices, including guidelines for network segmentation, access control, and security monitoring. It also covers the requirements for maintaining the security of the devices and systems throughout their lifecycle.
In summary, IEC 62443-4-1 focuses on the secure development of software used in IACS, while IEC 62443-4-2 focuses on the security of network-connected devices and systems used in IACS.