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ISO/IEC 27001 Control

ISO27001-A8.12 — Data Leakage Prevention

Measures are defined to prevent unauthorized disclosure or loss of sensitive information.

Framework: ISO/IEC 27001 (2022)
Category: Data Protection
Severity: High

Standards assurance

ISO/IEC 27001
Version: 2022
High
Evidence types: 3

Control objective

Define classification, handling, and protection controls for sensitive data.

Measures are defined to prevent unauthorized disclosure or loss of sensitive information.

Control facts

Code: ISO27001-A8.12

Framework: ISO/IEC 27001 (2022)

Category: Data Protection

Severity: high

Browse all ISO/IEC 27001 controls →

Why this control matters

Measures are defined to prevent unauthorized disclosure or loss of sensitive information.

  • • Define classification, handling, and protection controls for sensitive data.
  • • Auditors typically expect data classification standard and encryption policy as evidence of operation.
  • • Maps to policy categories: Data Protection, It Security.

How Quick Policy implements this control

The platform generates supporting policies, training, and evidence requirements automatically.

  • • Policies covering this control are pre-drafted and mapped
  • • Required evidence is defined per control, with upload and audit-packet export built in
  • • Owner assignment and review cadence built in
  • • Training campaigns reference the control to demonstrate operating effectiveness

Evidence auditors expect

  • • data classification standard
  • • encryption policy
  • • DLP alerts

Maps to policy categories

DATA_PROTECTION
IT_SECURITY

How Quick Policy demonstrates ISO27001-A8.12 operating effectiveness

Continuous evidence capture, mapped policies, and training campaigns — all aligned to this control.

1

Capture Core Profile

6-8 minutes
Unlocks drafting with a verified organisational baseline.

Admins complete adaptive onboarding to establish operating model, risk posture, and compliance objectives.

2

Determine Applicable Standards

1-2 minutes
Prevents generic policies by grounding outputs in real obligations.

Standards applicability ranks obligations by industry, geography, services, and data profile.

3

Generate and Harmonise Policy

3-8 minutes
Creates review-ready drafts with quality diagnostics and provenance.

Three-pass generation drafts, repairs contradictions, and validates coverage before reviewer handoff.

4

Review, Approve, and Sign Off

Team dependent
Maintains accountability, publication controls, and an exportable sign-off record.

Approvers validate policy language, mappings, and obligations, then publish through a sign-off chain that tracks every person against every policy on one exportable compliance matrix.

Frequently asked questions

What evidence do auditors expect for ISO27001-A8.12?

Typically: data classification standard; encryption policy; DLP alerts. Quick Policy defines the expected evidence for this control, lets your team upload and attach it, and packages it into an audit-ready export. A watchdog also monitors for regulatory and standard changes that could affect this control's requirements.

How does this control map to other frameworks?

The platform maintains a crosswalk between baseline frameworks, so the same uploaded evidence file can be attached to related controls across ISO 27001, SOC 2, NIST CSF, and HIPAA rather than being collected separately for each.

Related guidance

Explore the full ISO/IEC 27001 catalogue or related policy templates.

Demonstrate ISO27001-A8.12 operating effectiveness

See how the platform builds policy, training, and evidence in one source-of-truth.

Data Leakage Prevention FAQs

What evidence do auditors expect for ISO27001-A8.12?

Typically: data classification standard; encryption policy; DLP alerts. Quick Policy defines the expected evidence for this control, lets your team upload and attach it, and packages it into an audit-ready export. A watchdog also monitors for regulatory and standard changes that could affect this control's requirements.

How does this control map to other frameworks?

The platform maintains a crosswalk between baseline frameworks, so the same uploaded evidence file can be attached to related controls across ISO 27001, SOC 2, NIST CSF, and HIPAA rather than being collected separately for each.