Cryptography and Data Encryption Policy

CIAO ESSENTIAL — POLICY
C-AO/POL/CAO-430:2026 PUBLIC
Cryptography and Data Encryption Policy
CAO-400 Cybersecurity sub-policy (CAO-430) — auto-drafted, pending panel review
Date Issued  22 June 2026
Review Date  22 June 2027
Cite as: CIAO Standard. (2026). Cryptography and Data Encryption Policy. v1.1.3.7. C-AO/POL/CAO-430:2026. www.c-ao.com

1 · Purpose

This policy establishes the requirements for cryptography and data encryption policy within the CAO-400 Cybersecurity. It gives effect, in a single harmonised instrument, to the control objectives upon which recognised standards converge for this area.

2 · Scope

This policy applies to all information, systems, services, personnel and third parties within the scope of the management system.

3 · Policy statements

3.x · CAO-430 Policy Controls

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The organisation shall establish, implement and maintain a coherent and effective approach to cryptography and data encryption, giving effect to the organisational control objectives set out below.

CCPACOBIT 2019GDPRHIPAAISO/IEC 27001ISO/IEC 27002ISO/IEC 27017ISO/IEC 27018King VNIS2NIST CSF 2.0NIST SP 800-53PCI-DSS v4.0.1PIPEDAPOPIASOC 2 Type IIUK DPA 2018UK GDPR

3.1 · CAO-431 Cryptographic Controls

The organisation shall establish, implement and maintain effective Cryptographic Controls, giving effect to the organisational controls set out below.

HIPAAISO/IEC 27001ISO/IEC 27002ISO/IEC 27017NIS2NIST SP 800-53

3.1.x · CAO-431 Organisational Controls

Essential taster — a preview of the Professional depth for this high-density control area.

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

3.2 · CAO-432 Cryptographic Key Management

The organisation shall establish, implement and maintain effective Cryptographic Key Management, giving effect to the organisational controls set out below.

NIST SP 800-53PCI-DSS v4.0.1

3.2.x · CAO-432 Organisational Controls

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

3.3 · CAO-433 Data Encryption at Rest

The organisation shall establish, implement and maintain effective Data Encryption at Rest, giving effect to the organisational controls set out below.

NIST CSF 2.0NIST SP 800-53PCI-DSS v4.0.1

3.3.x · CAO-433 Organisational Controls

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

3.4 · CAO-434 Data Protection in Transit

The organisation shall establish, implement and maintain effective Data Protection in Transit, giving effect to the organisational controls set out below.

NIST CSF 2.0NIST SP 800-53

3.4.x · CAO-434 Organisational Controls

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

3.5 · CAO-435 Data Masking and Minimisation

The organisation shall establish, implement and maintain effective Data Masking and Minimisation, giving effect to the organisational controls set out below.

HIPAAISO/IEC 27001ISO/IEC 27002NIST SP 800-53PCI-DSS v4.0.1

3.5.x · CAO-435 Organisational Controls

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

3.6 · CAO-436 Data Leakage Prevention

The organisation shall establish, implement and maintain effective Data Leakage Prevention, giving effect to the organisational controls set out below.

ISO/IEC 27001ISO/IEC 27002NIST SP 800-53

3.6.x · CAO-436 Organisational Controls

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

3.7 · CAO-437 Data Retention and Secure Deletion

The organisation shall establish, implement and maintain effective Data Retention and Secure Deletion, giving effect to the organisational controls set out below.

ISO/IEC 27001ISO/IEC 27002NIST SP 800-53PCI-DSS v4.0.1

3.7.x · CAO-437 Organisational Controls

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

3.8 · CAO-438 Data Security Management

The organisation shall establish, implement and maintain effective Data Security Management, giving effect to the organisational controls set out below.

CCPACOBIT 2019GDPRHIPAAISO/IEC 27018King VNIST CSF 2.0NIST SP 800-53PCI-DSS v4.0.1PIPEDAPOPIASOC 2 Type IIUK DPA 2018UK GDPR

3.8.x · CAO-438 Organisational Controls

Essential taster — a preview of the Professional depth for this high-density control area.

Professional tier required. The organisational control objectives that decompose this area, and the technical controls beneath them, are revealed at Professional tier and above. Log in or view options ↗

4 · Roles & responsibilities

5 · Compliance, monitoring & review

Compliance with this policy is mandatory. This policy is reviewed at least annually, or upon significant change to the threat, regulatory or technological environment. Exceptions require documented risk acceptance by the accountable owner.

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