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 According to ISO/IEC 27001 : 2022 Lead Implementer, residual risk is the risk remaining after risk treatment. Residual risk should be compared with the acceptable level of risk, which is the level of risk that the organization is willing to tolerate. If the residual risk is below the acceptable level of risk, then the risk can be accepted. If the residual risk is above the acceptable level of risk, then additional risk treatment options should be considered. Therefore, TradeB should evaluate, calculate, and document the value of risk reduction following risk treatment, which is the difference between the initial risk and the residual risk. This will help TradeB to determine whether the risk treatment was effective and whether the residual risk is acceptable or not.

References:

ISO/IEC 27001 : 2022 Lead Implementer Study guide and documents, section 8.3.2 Risk treatment

ISO/IEC 27001 : 2022 Lead Implementer Info Kit, page 14, Risk management process

 According to ISO/IEC 27001:2022, information security risk can be accepted as one of the four possible options for risk treatment, along with avoiding, modifying, or sharing the risk12. Risk acceptance means that the organization decides to tolerate the level of risk without taking any further action to reduce it3. Risk acceptance can be done before, during, or after the risk treatment process, depending on the organization’s risk criteria and the residual risk level4.

References: 1: ISO 27001 Risk Assessments | IT Governance UK 2: ISO 27001 Risk Assessment: 7 Step Guide - IT Governance UK Blog 3: ISO 27001 Clause 6.1.2 Information security risk assessment process 4: ISO 27001 Risk Assessment & Risk Treatment: The Complete Guide - Advisera

The power/interest matrix is a tool that can be used to identify, analyze, and manage interested parties according to ISO/IEC 27001:2022. The power/interest matrix is a two-dimensional diagram that plots the level of power and interest of each interested party in relation to the organization’s information security objectives. The power/interest matrix can help the organization to prioritize the interested parties, understand their expectations and needs, and develop appropriate communication and engagement strategies. The power/interest matrix can also help the organization to identify potential risks and opportunities related to the interested parties.

References: ISO/IEC 27001:2022, clause 4.2; PECB ISO/IEC 27001 Lead Implementer Course, Module 4, slide 12.

According to ISO/IEC 27001:2013, clause 9.1, an organization must monitor, measure, analyze and evaluate its information security performance and effectiveness. Thisincludes determining what needs to be monitored and measured, the methods for doing so, when and by whom the monitoring and measurement shall be performed, when the results shall be analyzed and evaluated, and who shall be responsible for ensuring that the actions arising from the analysis and evaluation are taken 1.

SunDee failed to comply with this requirement and did not monitor or measure the performance and effectiveness of its ISMS for the past two years. As a result, the company did not have any objective evidence or indicators to demonstrate the achievement of its information security objectives, the effectiveness of its controls, the satisfaction of its interested parties, or the identification and treatment of its risks. Thisalso meant that the company did not conduct regular management reviews of its ISMS, as required by clause 9.3, which would provide an opportunity for the top management to ensure the continuing suitability, adequacy and effectiveness of the ISMS, and to decide on any changes or improvements needed 1.

Just before the recertification audit, the company decided to conduct an internal audit, as required by clause 9.2, which is a systematic, independent and documented process for obtaining audit evidence and evaluating it objectively to determine the extent to which the audit criteria are fulfilled 1. However, the company did not have a well-defined audit program, scope, criteria, or methodology, and relied on the written reports of its staff for the past two years. This caused a disruption in the workforce, as most of the staff had to compile their reports for their departments, leaving the Production Department with less than the optimum workforce, which decreased the company’s stock. Moreover, the internal audit process was very inconsistent, as the reports were written by different employees with different styles, formats, and levels of detail. The internal audit process also lacked any qualitative measures, such as performance indicators, metrics, or benchmarks, to evaluate the performance and effectiveness of the ISMS.

Therefore, the cause of SunDee’s workforce disruption was the negligence of performance evaluation and monitoring and measurement procedures, which led to a lack of objective evidence, a poorly planned and executed internal audit, and a decrease in the company’s productivity and stock value.

References: 1: ISO/IEC 27001:2013, Information technology – Security techniques – Information security management systems – Requirements

 Risk modification is one of the four risk treatment options defined by ISO/IEC 27001, which involves applying controls to reduce the likelihood and/or impact of the risk. By requiring its employees to change their email passwords at least once every 60 days, Company A has implemented a risk modification option to reduce the risk of unauthorized access to its email accounts. Changing passwords frequently can make it harder for attackers to guess or crack the passwords, and can limit the damage if a password is compromised.

The other three risk treatment options are:

Risk avoidance: This option involves eliminating the risk source or discontinuing the activity that causes the risk. For example, Company A could avoid the risk of email compromise by not using email at all, but this would also mean losing the benefits of email communication.

Risk retention: This option involves accepting the risk and its consequences, either because the risk is too low to justify any treatment, or because the cost of treatment is too high compared to the potential loss. For example, Company A could retain the risk of email compromise by not implementing any security measures, but this would expose the company to potential breaches and reputational damage.

Risk transfer: This option involves sharing or transferring the risk to a third party, such as an insurer, a supplier, or a partner. For example, Company A could transfer the risk of email compromise by outsourcing its email service to a cloud provider, who would be responsible for the security and availability of the email accounts.

References:

ISO/IEC 27001:2013, clause 6.1.3: Information security risk treatment

ISO/IEC 27001 Lead Implementer Course, Module 4: Planning the ISMS based on ISO/IEC 27001

ISO/IEC 27001 Lead Implementer Course, Module 6: Implementing the ISMS based on ISO/IEC 27001

ISO/IEC 27001 Lead Implementer Course, Module 7: Performance evaluation, monitoring and measurement of the ISMS based on ISO/IEC 27001

ISO/IEC 27001 Lead Implementer Course, Module 8: Continual improvement of the ISMS based on ISO/IEC 27001

ISO/IEC 27001 Lead Implementer Course, Module 9: Preparing for the ISMS certification audit

ISO 27001 Risk Assessment & Risk Treatment: The Complete Guide - Advisera1

Infosec Risk Treatment for ISO 27001 Requirement 8.3 - ISMS.online2

ISO 27001 Clause 6.1.3 Information security risk treatment3

ISO 27001 Risk Treatment Plan - Scrut Automation4

Annex A 7.1 of ISO/IEC 27001 : 2022 is a control that requires an organization to define and implement security perimeters and use them to protect areas that contain information and other associated assets. Information and information security assets can include data, infrastructure, software, hardware, and personnel. The main purpose of this control is to prevent unauthorized physical access, damage, and interference to these assets, which could compromise the confidentiality, integrity, and availability of the information. Physical security perimeters can include fences, walls, gates, locks, alarms, cameras, and other barriers or devices that restrict or monitor access to the facility or area. The organization should also consider the environmental and fire protection of the assets, as well as the disposal of any waste or media that could contain sensitive information.

References:

ISO/IEC 27001 : 2022 Lead Implementer Study Guide, Section 5.3.1.7, page 101

ISO/IEC 27001 : 2022 Lead Implementer Info Kit, page 17

ISO/IEC 27002 : 2022, Control 7.1 – Physical Security Perimeters123