ISA-IEC-62443 Exam Dumps - ISA/IEC 62443 Cybersecurity Fundamentals Specialist

ISO/IEC 15408, also known as the Common Criteria for Information Technology Security Evaluation, is an international standard that provides a framework for evaluating the security of IT products and systems. The purpose of the standard is to define a common set of requirements for the security functions and assurance measures of IT products and systems, and to establish a common methodology for conducting security evaluations. The standard allows users to specify their security needs and expectations in a Security Target (ST), which may be based on one or more Protection Profiles (PPs) that define security requirements for a class of products or systems. Vendors can then implement or claim compliance with the ST or PPs, and have their products or systems evaluated by independent testing laboratories against the security criteria defined in the standard. The standard also defines a scale of Evaluation Assurance Levels (EALs) that indicate the degree of confidence in the security of the evaluated product or system. The standard is intended to facilitate the development, procurement, and use of secure IT products and systems, and to promote the recognition and acceptance of evaluation results across different countries and regions. References:

ISO/IEC 15408-1:2009 - Common Criteria Evaluation for IT Security - Nemko1

Common Criteria - Wikipedia2

ISO/IEC Standard 15408 — ENISA3

 Network security is important in IACS environments because PLCs, or programmable logic controllers, are devices that control physical processes and equipment in industrial settings. PLCs under cyber attack can have costly and dangerous impacts, such as disrupting production, damaging equipment, compromising safety, and harming the environment. Therefore, network security is essential to protect PLCs and other IACS components from unauthorized access, modification, or disruption. The other choices are not primary reasons why network security is important in IACS environments. PLCs are not inherently unreliable, but they can be affected by environmental factors, such as temperature, humidity, and electromagnetic interference. PLCs are programmed using ladder logic, which is a graphical programming language that resembles electrical schematics. PLCs use serial or Ethernet communications methods, depending on the type and age of the device, to communicate with other IACS components, such as human-machine interfaces (HMIs), supervisory control and data acquisition (SCADA) systems, and distributed control systems (DCSs). References:

ISA/IEC 62443 Standards to Secure Your Industrial Control System training course1

ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide2

Using the ISA/IEC 62443 Standard to Secure Your Control Systems3

According to the ISA/IEC 62443-2-1 standard, security policy, organization, and awareness is one of the four foundational requirements for an IACS security management system. It defines the “policies, procedures, and organizational structure necessary to support the security program” 1. One of the elements of this requirement is staff training and security awareness, which involves “providing appropriate security education and training to all personnel who have access to or are responsible for IACS components” 1. This element aims to ensure that the staff are aware of the security risks, policies, and procedures, and are able to perform their roles and responsibilities in a secure manner. Staff training and security awareness can include topics such as security principles, threats and vulnerabilities, incident response, password management, physical security, and social engineering 2. References:

ISA/IEC 62443 Series of Standards - ISA

Security of Industrial Automation and Control Systems - ISAGCA

ISA/IEC 62443-2-1 emphasizes the importance of the ongoing evaluation of organizational responsibilities and training as part of continuous improvement within the CSMS. Periodic assessment ensures that personnel remain aware of their roles, are adequately trained, and that the program adapts to changes in the environment, technology, or threat landscape. The standard discourages keeping responsibilities static or expanding without control; instead, it advocates for regular reviews and updates.

 According to the IEC 62443 standard, a capability security level (SL-C) is defined as “the security level that a component or system is capable of meeting when it is properly configured and protected by an appropriate set of security countermeasures” 1. A component or system can have different SL-Cs for different security requirements, depending on its design and implementation. The SL-C is determined by testing the component or system against a set of security test cases that correspond to the security requirements. The SL-C is not dependent on the actual operational environment or configuration of the component or system, but rather on its inherent capabilities. References:

IEC 62443 - Wikipedia