information security policy

An information security policy is a formal, approved document that defines how an organization protects its information and information systems from unauthorized access, use, disclosure, disruption, modification, or destruction. It sets high-level rules, roles, and responsibilities for managing information security across people, processes, and technology.

Scope and typical contents

In industrial and manufacturing environments, an information security policy commonly covers:

• Objectives and scope for protecting IT and OT systems, data, and networks
• Roles and responsibilities for management, IT/OT, engineering, and end users
• Acceptable use of systems, networks, and devices (including plant-floor equipment)
• Access control principles, such as least privilege and account management
• Requirements for passwords, multi-factor authentication, and remote access
• Handling of sensitive information, including production data, IP, and customer data
• Requirements for patching, vulnerability management, and secure configurations
• Malware protection and endpoint security expectations
• Backup, recovery, and business continuity expectations for critical systems
• Incident reporting and response responsibilities
• Supplier and third-party security expectations at a policy level
• Training and awareness expectations for all personnel
• Governance, including policy ownership, review cycle, and exception handling

The policy usually sits at the top of an information security documentation hierarchy, supported by standards, procedures, and work instructions that detail how the policy is implemented.

Operational meaning in regulated manufacturing

Operationally, an information security policy impacts how:

• MES, ERP, quality systems, and OT control systems are accessed and administered
• Network segmentation between corporate IT and plant-floor OT is defined and managed
• Change control, patching, and configuration management are performed on production systems
• Production and quality data are stored, transmitted, and shared with external partners
• Suppliers, system integrators, and service providers are required to protect connected systems

In regulated environments, the information security policy is often used to demonstrate that there is a defined governance framework for protecting data and systems, which may be supported by separate cybersecurity standards, risk assessments, and incident procedures.

Use with suppliers and critical partners

When assessing critical suppliers, organizations frequently request or review the supplier’s information security policy as part of due diligence. This document helps the buying organization understand:

• The supplier’s overall approach to protecting hosted or integrated systems
• How security responsibilities are assigned within the supplier’s organization
• Whether there is a structured framework behind more detailed practices, such as secure development, change control, and vulnerability management

Suppliers may also be required to align with or acknowledge the customer’s information security policy when accessing the customer’s systems or handling the customer’s data.

Common confusion

• Information security policy vs. cybersecurity policy: In many organizations, these terms are used interchangeably. Some use “information security” as an umbrella that includes cybersecurity, physical security of information assets, and administrative controls.
• Information security policy vs. procedure or standard: The policy states what must be achieved or controlled at a high level. Standards and procedures describe specific technical configurations and step-by-step activities to implement the policy.
• Information security policy vs. acceptable use policy: An acceptable use policy is often a separate, user-focused document. It may be referenced by, or included within, the broader information security policy.