標準簡介
IEC 62443 (ISA/IEC 62443) 是由 國際電工委員會 (IEC) 發布的現行有效標準，常用於製造業、能源、科技、汽車、電子產品等產業，並適用於全球等市場。
本頁整理了 IEC 62443 (ISA/IEC 62443) 的官方文件、目前狀態以及常見相關認證或評估機構，便於快速理解要求與落地路徑。
Defense in Depth
Promotes a multi-layered security approach with zones and conduits, ensuring no single point of failure can compromise the entire industrial control system.
Stakeholder-Based Framework
Defines distinct requirements for asset owners, system integrators, and product suppliers — ensuring security responsibilities are clear across the supply chain.
Security Levels
Introduces four security levels (SL 1–4) representing increasing protection against casual, intentional, sophisticated, and state-sponsored threats respectively.
list_alt Series Structure
- Part 1: General concepts, terminology, and models
- Part 2: Policies, procedures, and security management system
- Part 3: System-level security requirements and security levels
- Part 4: Component and product development requirements
- Zones and conduits model for network segmentation
- Four security levels (SL 1–4) for risk-based protection
- Secure product development lifecycle (IEC 62443-4-1)
- Covers entire IACS lifecycle from design through decommissioning
誰需要合規？
Organizations operating industrial automation and control systems — including manufacturing, energy and utilities, oil and gas, transportation, building automation, water treatment, and any sector with operational technology (OT) environments.
關鍵要求
Security Risk Assessment
Conduct a thorough risk assessment of the IACS environment. Identify threats, vulnerabilities, and consequences. Determine target security levels for each zone based on the risk assessment results.
Zones and Conduits
Segment the IACS network into security zones with common security requirements. Define conduits that control communications between zones. Apply appropriate security controls at zone boundaries.
Secure Development Lifecycle
Product suppliers must follow a secure development lifecycle (IEC 62443-4-1) including threat modeling, secure coding practices, security testing, and vulnerability management throughout the product lifecycle.
Security Management System
Asset owners must implement an IACS security management system covering security policies, organization, staff competence, awareness training, incident response, and business continuity planning.
Patch and Change Management
Establish processes for evaluating, testing, and deploying security patches to IACS components. Maintain a formal change management process to prevent unauthorized modifications to the control system.
實施路線圖
定義工業自動化和控制系統網絡安全範圍
識別 IEC 62443 覆蓋的產品、服務、場所、系統、團隊、司法轄區和相關方。確認責任人、邊界、適用義務、文件和證據期望，範圍包括IACS 安全計劃、區域和通道、安全等級、風險評估、安全開發、系統集成、補丁、遠程訪問、監控和事件響應。
評估差距並排列風險優先級
將當前實踐與預期的工業自動化和控制系統網絡安全方法進行比較。審查資產清單、區域模型、威脅和風險評估、訪問控制、網絡分段、加固、漏洞處理、備份、恢復、供應商保證和安全維護，並按法律暴露、安全影響、客戶承諾、運營依賴以及審覈或市場準入準備度排列差距優先級。
實施控制和記錄
部署所需程序、技術控制、評審關口、培訓、供應商流程、報告路徑和運行記錄。維護IACS 資產登記冊、區域圖、風險評估、安全要求、安全開發記錄、補丁決策、訪問評審、事件日誌、備份測試和供應商證據作爲可追溯證據。
評審、審覈並改進
開展內部評審、管理報告、審覈、糾正措施和變更評估。當產品、服務、供應商、技術、法規、事件或相關方期望變化時刷新項目。
合規檢查清單
checklist 範圍與治理
checklist 控制與證據
checklist 監控與改進
處罰與執行
No direct legal penalties — IEC 62443 is a voluntary standard. However, it is referenced by regulations such as the EU NIS2 Directive and the US NIST Cybersecurity Framework. Non-compliance can result in regulatory findings and increased liability following cyber incidents.
常見問題解答
誰需要 IEC 62443？
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IEC 62443 最適用於保護 OT 和 IACS 環境的資產所有者、系統集成商、產品供應商和服務提供商。具體範圍取決於產品、服務、司法轄區、客戶承諾，以及組織是否需要認證、符合性證據、監管準備或內部治理。
IEC 62443 是否可認證？
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IEC 62443 可根據採用的部分和認證方案支持產品、過程和現場評估。
實施時應先關注什麼？
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先定義範圍和義務，再建立當前狀態差距評估。早期最重要的工作是確認責任、受影響資產或過程、風險準則、客戶或法律驅動因素，以及組織必須能夠提供的證據。
IEC 62443 需要哪些證據？
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有用證據包括IACS 資產登記冊、區域圖、風險評估、安全要求、安全開發記錄、補丁決策、訪問評審、事件日誌、備份測試和供應商證據。證據應進行版本控制，能夠追溯到責任人，並關聯風險、義務、控制、決策和糾正措施。
項目應多久評審一次？
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應按計劃週期評審，並在產品、服務、供應商、運行環境、事件、客戶承諾或法規變化時評審。高風險領域應採用更頻繁的監控和管理報告。