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ISO 27001 Annex A 5.10: Acceptable Use of Information and Other Associated Assets – Practical Implementation Guide

ISO/IEC 27001:2022 Annex A · Control 5.10

Acceptable Use of Information and Other Associated Assets: A Practical Implementation Guide

Give users clear, realistic rules for handling information, devices, systems and services.

Acceptable-use rules define permitted and prohibited behavior for information and associated assets throughout their lifecycle.

Practical interpretation: A signed policy is only a starting point. Rules must match actual tools and working practices, be communicated, enforceable and supported by proportionate monitoring and consequences.

What should the control achieve?

  • Users understand permitted and prohibited behavior.
  • Rules cover relevant assets, technologies and contexts.
  • Exceptions are authorized and time limited.
  • Violations are consistently handled.

Step-by-step implementation

1

Identify use scenarios

Cover corporate devices, personal devices, email, internet, removable media, cloud services, AI tools, remote work and confidential information.

2

Write practical rules

Use examples and distinguish mandatory rules from guidance.

3

Align with law and culture

Review privacy, monitoring, employment and works-council requirements.

4

Communicate and acknowledge

Include onboarding, periodic refreshers and targeted updates.

5

Enforce and monitor

Configure technical restrictions where appropriate and define proportionate investigation.

6

Manage exceptions

Document business need, risk, safeguards, owner and expiry.

What this could look like in practice

A consultancy permits limited personal use of laptops but prohibits unapproved file-sharing and entering client data into public AI tools. Web filtering blocks high-risk categories, staff acknowledge the policy at onboarding and exceptions require Security approval.

ActivityPractical implementationEvidence
OnboardingEmployee reviews rules before receiving equipment.Acknowledgement record
New technologyPolicy owner assesses AI and collaboration use cases.Updated guidance
ViolationManager, HR and Security follow a documented response.Case record

Implementation evidence

  • Acceptable-use policy
  • Acknowledgements
  • Awareness materials
  • Technical restrictions
  • Exception register
  • Investigation procedure
  • Disciplinary linkage
  • Review history

Useful metrics

  • Acknowledgement completion
  • Policy-related incidents
  • Expired exceptions
  • Repeated violations

Common mistakes

  • Using generic rules employees cannot interpret.
  • Banning common practices without approved alternatives.
  • Monitoring without legal review or transparency.
  • Ignoring contractors and personal devices.
  • Failing to update rules for new technology.

Questions an auditor may ask

  • How are users informed of acceptable use?
  • Which behaviors are technically restricted?
  • How are exceptions approved?
  • Show how a recent violation was handled.
Implementation test: Ask employees in different roles whether they know how to handle personal use, removable media, cloud sharing and public AI tools.

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This independent educational guide paraphrases the practical intent of the control and does not replace the official ISO standards, professional advice or an organization-specific risk assessment. It is not affiliated with or endorsed by ISO.