Policies for information security

“Policies for information security” is an execution requirement, not a documentation exercise. ISO/IEC 27017:2015 Clause 5.1.1 expects a governed set of security policies that management approves, the organization publishes, and people (and relevant third parties) can actually follow. In a cloud context, the requirement tightens: your policy set must spell out shared responsibility, especially the roles and responsibilities of cloud service providers and cloud service customers.

For a CCO, Compliance Officer, or GRC lead, the fastest path is to treat this as a lifecycle: define the minimum policy set, assign owners, run formal approval, publish in a controlled repository, then prove communication and adoption through onboarding, training, contract language, and security collateral. The “cloud-specific” part is where most teams get stuck. Auditors will look for explicit responsibility boundaries for identity, configuration, logging, encryption, incident response, and access provisioning across the cloud stack.

This page gives you requirement-level implementation guidance you can implement quickly: who it applies to, what to build, how to roll it out, what evidence to retain, and how to avoid the common mistakes that create audit findings and operational drift.

Regulatory text

ISO/IEC 27017:2015 Clause 5.1.1 states: “A set of policies for information security shall be defined, approved by management, published and communicated to employees and relevant external parties. Cloud-specific implementation guidance shall address the roles and responsibilities of cloud service providers and cloud service customers.” ¹

What the operator must do: maintain a controlled set of information security policies with documented management approval, make the policies available in a governed way, and demonstrate that employees and relevant external parties receive and understand what applies to them. For any cloud service you provide or consume, your policy language must clearly allocate responsibilities between customer and provider.

Plain-English interpretation (what the requirement means)

You must have security policies that are:

1. Defined: written, scoped, and owned (not tribal knowledge).
2. Approved by management: signed off by accountable leadership with authority to commit the organization.
3. Published: accessible through an official channel where the current version is unambiguous.
4. Communicated: employees know what applies; relevant external parties get the right policies or requirements.
5. Cloud-specific: the policy set explicitly states who does what between the cloud customer and cloud provider.

A policy set is a top-down statement of intent and rules. Procedures, standards, and technical baselines can sit underneath, but you still need policies that set direction and create accountability.

Who it applies to

Entity types:

• Cloud Service Providers (CSPs): you provide cloud services to customers. Your policies must define your responsibilities and communicate relevant parts to customers and other external parties.
• Cloud Service Customers (CSCs): you consume cloud services. Your policies must define how you use cloud securely and what you expect from your provider and other third parties. ¹

Operational context where it bites hardest:

• Multi-team environments where infrastructure, security, and product teams share cloud admin duties.
• Regulated customers asking for security documentation, contractual security commitments, or attestations.
• Heavy third-party dependency chains (managed hosting, SaaS platforms, MSPs, sub-processors).

What you actually need to do (step-by-step)

1) Define the minimum policy set and scope it to cloud

Build (or validate) a policy hierarchy with a clear “policy vs. standard vs. procedure” distinction. Start with a manageable set of core policies and ensure cloud coverage is explicit. A practical minimum set often includes:

• Information Security Policy (umbrella / governance)
• Access Control Policy (identity, privileged access, authentication expectations)
• Cryptography / Encryption Policy (data at rest/in transit, key management expectations)
• Asset & Data Classification/Handling Policy (including cloud storage and backups)
• Logging & Monitoring Policy (cloud logs, retention expectations, alerting ownership)
• Vulnerability & Patch Management Policy (including cloud services and images)
• Secure Development Policy (if you build software)
• Incident Response Policy (including cloud provider escalation and evidence handling)
• Third-Party Security / Supplier Policy (security obligations and assessment)

Make sure each policy states:

• Purpose, scope, and audience
• Mandatory requirements (“must” statements) that can be audited
• Ownership (role), exception process, and enforcement consequences
• References to supporting standards/procedures

2) Add cloud-specific responsibility allocation (shared responsibility)

Create a shared responsibility appendix (or embed responsibility tables in relevant policies). This is the ISO/IEC 27017-specific expectation: roles and responsibilities between provider and customer must be addressed. ¹

Use a RACI-style matrix for common domains:

Control domain	Customer responsibilities	Provider responsibilities	Evidence pointer
Identity & access	Joiner/mover/leaver, RBAC approvals, MFA enforcement for tenant	Platform IAM capabilities, identity service availability	Access policy + IAM standard
Configuration	Secure tenant configuration, guardrails, change approvals	Secure underlying cloud fabric	Cloud configuration standard
Logging	Enable logs, monitor alerts, investigate	Provide audit log sources and integrity features	Logging policy + SIEM procedures
Encryption	Decide what data needs encryption, manage customer keys if used	Encrypt platform services where applicable, key custody terms	Crypto policy + KMS standard
Incident response	Detect, triage, notify provider, preserve tenant evidence	Platform incident handling, customer notification commitments	IR policy + incident comms plan

This matrix becomes your “no ambiguity” artifact for audits and customer security reviews.

3) Route for management approval (and capture it cleanly)

Define what “management approval” means in your organization:

• Acceptable approvers (CISO, CIO, CEO, security steering committee)
• Approval mechanism (GRC workflow, signed PDF, meeting minutes with resolution)

Approval needs to be traceable to a specific version. If you approve “the policy” but can’t prove which version, auditors will treat it as weak control design.

4) Publish in a controlled channel

“Published” means the authoritative policy is available and staff can find it. Typical options:

• GRC platform policy module
• Controlled intranet page with read-only PDFs
• Document management system with version control

Publishing also includes change control: the current version is clearly marked, older versions are archived, and distribution is consistent.

5) Communicate to employees (and prove it)

Communication must be more than “it exists in the wiki.” Build a repeatable pattern:

• New hire onboarding includes required policy reading
• Annual or role-based security training references the policy set
• Targeted communications for high-risk roles (engineering, IT admins, support)

Capture proof:

• Attestations (read/understood)
• Training completion records tied to policy updates
• Email or LMS campaign logs for major revisions

6) Communicate to relevant external parties

“Relevant external parties” usually means:

• Cloud customers (if you are a provider)
• Critical third parties who process or access your data
• Subcontractors who must follow your security requirements

Operationalize this through:

• Contract clauses, data processing terms, and security addenda
• Supplier security requirements documents
• Customer-facing security documentation (policy excerpts, shared responsibility model, acceptable use rules)

Do not dump your entire internal policy library on third parties. Provide what is relevant to their role and your contractual relationship.

7) Set review and exception mechanics

ISO/IEC 27017 Clause 5.1.1 doesn’t prescribe review frequency, but auditors will expect a defined review trigger and evidence that you follow it. Use:

• Scheduled review cadence you can sustain
• Event-driven reviews (material incident, major cloud architecture change, new regulatory/customer requirement)
• A formal exception process with compensating controls and expiration

Required evidence and artifacts to retain

Keep evidence that maps directly to “defined, approved, published, communicated” plus cloud-specific responsibility clarity:

• Policy inventory (list of policies, owners, current versions)
• Policy documents with version history and effective dates
• Management approval records (workflow approvals, signatures, or meeting minutes referencing a specific version)
• Publication evidence (system screenshots, repository metadata, access permissions)
• Employee communication records (LMS reports, attestation logs, onboarding checklists)
• External communication artifacts (security addendum templates, supplier requirements, customer security docs, contract clause library)
• Shared responsibility matrix for each cloud service model you provide or consume
• Exceptions register (approvals, compensating controls, expiry)

Common exam/audit questions and hangups

Expect auditors to probe these points:

• “Show me your full policy set and how it’s governed.”
• “Who approved the policies, and when? Show the approval trail for the current version.”
• “Where are policies published? How do you ensure employees access the current version?”
• “How do you communicate policies to external parties, and which ones are ‘relevant’?”
• “Where do you define customer vs. provider responsibilities for key cloud controls?” ¹

Hangups that cause findings:

• Policies exist, but there is no proof of communication or attestation.
• Cloud responsibility statements are generic and don’t map to actual services.
• Different teams maintain conflicting “security rules” in separate docs.

Frequent implementation mistakes (and how to avoid them)

1. Writing aspirational policies that your teams don’t follow
   Fix: write testable “must” statements tied to real systems and workflows. If you can’t evidence it, don’t mandate it yet.

2. Missing cloud-specific responsibility boundaries
   Fix: publish a responsibility matrix and map it to service models you actually use (SaaS vs PaaS vs IaaS) and to your customer contracts if you are a provider.

3. No controlled publication channel
   Fix: choose one source of truth, lock editing, and formalize updates through change control.

4. Treating external parties as an afterthought
   Fix: bake security requirements into procurement and contracting. For customers, provide a clear security packet that includes what they need to do vs. what you do.

5. Approvals that don’t bind to versions
   Fix: require approvals to reference policy name + version + effective date.

Enforcement context and risk implications

No public enforcement cases were provided in the source catalog for this requirement, so you should treat this primarily as an auditability and operational risk control rather than a “case law” topic.

Practically, weak policy governance tends to show up as:

• inconsistent access control and cloud configuration practices across teams,
• contract gaps with cloud providers or sub-processors,
• slower, messier incident response because responsibilities are unclear.

These are the same gaps customers and auditors focus on during cloud security reviews.

Practical execution plan (30/60/90-day)

You asked for speed, but the timeline depends on current maturity. Use phased execution and ship usable increments.

First 30 days (Immediate)

• Inventory what you already have; identify the authoritative “policy set” vs. scattered docs.
• Assign policy owners and define the approval authority.
• Draft or refine the top-level Information Security Policy plus a shared responsibility matrix for your primary cloud environment.
• Stand up a controlled publication location and an exceptions register.

By 60 days (Near-term)

• Complete core supporting policies (access, logging, incident response, encryption, third-party).
• Run formal management approvals for the full set.
• Launch employee communication: onboarding integration and an attestation campaign for existing staff.
• Update contract templates: supplier requirements and customer-facing security terms where relevant.

By 90 days (Operationalize and prove)

• Validate adoption with spot checks: access reviews, logging enabled checks, incident runbook exercises.
• Align policy “must” statements with technical standards and procedures; remove contradictions.
• Package external communications: a customer security packet and a supplier security requirements document tied to procurement.
• Prepare an audit-ready evidence folder: approvals, publication proof, communication logs, responsibility matrices.

Where Daydream fits (practical, non-disruptive)

If you manage third-party risk and want the “relevant external parties” part to stop being ad hoc, Daydream can centralize supplier security requirements, track policy acknowledgments where appropriate, and keep contract/security artifacts tied to each third party record. That reduces scramble during assessments and renewals.

Frequently Asked Questions

Do we need one information security policy or multiple policies?

ISO/IEC 27017 calls for “a set of policies,” so multiple documents are acceptable and often easier to operate. What matters is that the set is governed as a coherent whole: defined, approved, published, and communicated. ¹

What counts as “approved by management”?

Approval must come from leadership with authority to accept risk and commit the organization to the requirements. Use a consistent approval workflow that ties the approver to a specific version and effective date.

How do we decide which external parties are “relevant”?

Focus on external parties who process, store, administer, or materially affect the security of your information or services. In practice, that includes key cloud providers, critical suppliers, and customers who have security responsibilities under a shared responsibility model.

We’re a cloud customer. Do we still need to document provider vs. customer responsibilities?

Yes. The requirement explicitly calls for cloud-specific guidance addressing responsibilities for cloud providers and cloud customers. Your policy set should explain what your teams must configure and operate versus what you rely on the provider to do. ¹

Can “published” mean a Slack post or email?

Use Slack or email for announcements, but “published” should mean a stable, authoritative repository where staff can find the current version at any time. Auditors will expect controlled access, versioning, and archival.

What is the minimum proof that policies were communicated?

Keep training/attestation records, onboarding checklists, and targeted communications for major updates. If you can’t show who received the policy and when, expect a control effectiveness finding.

Footnotes

1. ISO/IEC 27017:2015 Information technology — Security techniques — Code of practice for information security controls based on ISO/IEC 27002 for cloud services