ISA ISA-IEC-62443 Exam Questions & Answers

Correct Answer: C

The risk analysis category of an IACS consists of two elements: business rationale and risk identification and classification1. Business rationale is the process of defining the scope, objectives, and criteria for the risk analysis, as well as the roles and responsibilities of the stakeholders involved. Risk identification and classification is the process of identifying the assets, threats, vulnerabilities, and consequences of a cyberattack on the IACS, and assigning a risk level to each scenario based on the likelihood and impact of the attack1. These elements are essential for establishing a baseline of the current risk posture of the IACS and determining the appropriate risk treatment measures to reduce the risk to an acceptable level. References: 1: ISA/IEC 62443-3-2:2020, Security for industrial automation and control systems - Part 3-2: Security risk assessment for system design, International Society of Automation, Research Triangle Park, NC, USA, 2020.

Correct Answer: D

One of the trends that has increased the security risks for industrial automation and control systems (IACS) is the integration of these systems with business and enterprise systems, such as enterprise resource planning (ERP), manufacturing execution systems (MES), and supervisory control and data acquisition (SCADA). This integration exposes the IACS to the same threats and vulnerabilities that affect the business and enterprise systems, such as malware, denial-of-service attacks, unauthorized access, and data theft. Moreover, the integration also creates new attack vectors and pathways for adversaries to compromise the IACS, such as through remote access, wireless networks, or third-party devices. Therefore, the integration of IACS with business and enterprise systems is a trend that has caused a significant percentage of security vulnerabilities. References: ISA/IEC 62443 Standards to Secure Your Industrial Control System, page 1-2.

Correct Answer: A

The ISASecure Integrated Threat Analysis (ITA) Program is a certification scheme that certifies off-the-shelf automation and control systems to the ISA/IEC 62443 series of standards1. The ITA Program consists of three main components2:

Software Development Security Assurance (SDSA): This component evaluates the security lifecycle and practices of the product supplier, such as security requirements, design, implementation, verification, and maintenance. The SDSA

certification is based on the ISA/IEC 62443-4-1 standard. Functional Security Assessment (FSA): This component verifies the security functions and features implemented in the product, such as identification and authentication, access

control, encryption, audit logging, and security management. The FSA certification is based on the ISA/IEC 62443-4-2 standard. Communications Robustness Testing (CRT): This component tests the resilience of the product against network

attacks, such as denial-of-service, fuzzing, spoofing, and replay. The CRT certification is based on the ISA/IEC 62443-4-2 and ISA/IEC 62443-3-3 standards .

References:

1: ISASecure - IEC 62443 Conformance Certification - Official Site

2: ISASecure - IEC 62443 Conformance Certification - Official Site [3]: ISA/IEC 62443-4-1: Secure Product Development Lifecycle Requirements, ISA, 2018.

[4]: ISA/IEC 62443-4-2: Technical Security Requirements for IACS Components, ISA, 2019.

[5]: ISA/IEC 62443-4-2: Technical Security Requirements for IACS Components, ISA, 2019.

[6]: ISA/IEC 62443-3-3: System Security Requirements and Security Levels, ISA, 2013.