1 Scope
This document provides guidelines to plan and prepare for incident response and to
learn lessons from incident response. The guidelines are based on the “plan and prepare”
and “learn lessons” phases of the information security incident management phases
model presented in ISO/IEC 27035‑1:2023, 5.2 and 5.6.
The major points within the “plan and prepare” phase include:
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— information security incident management policy and commitment of top management;
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— information security policies, including those relating to risk management, updated
at both organizational level and system, service and network levels;
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— information security incident management plan;
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— Incident Management Team (IMT) establishment;
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— establishing relationships and connections with internal and external organizations;
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— technical and other support (including organizational and operational support);
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— information security incident management awareness briefings and training.
The “learn lessons” phase includes:
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— identifying areas for improvement;
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— identifying and making necessary improvements;
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— Incident Response Team (IRT) evaluation.
The guidance given in this document is generic and intended to be applicable to all
organizations, regardless of type, size or nature. Organizations can adjust the guidance
given in this document according to their type, size and nature of business in relation
to the information security risk situation. This document is also applicable to external
organizations providing information security incident management services.