--- title: "CER Compliance Reporting: Best Practices for Supply Chain Resilience" description: "Best practices for CER compliance reporting: linking physical key rights to identities so supply chain resilience can be proven to auditors." image: https://key2xs.com/hubfs/image.png --- [![Key2XS](https://key2xs.com/hubfs/img/logo-white-horizontal.svg) ![Key2XS](https://key2xs.com/hubfs/img/logo-blue-horizontal.svg)](https://key2xs.com/?hsLang=nl) Why Governance? 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That means linking every access right — including physical keys held by suppliers and contractors — to identities, policies and an audit trail. ## CER Compliance Reporting: Best Practices for Supply Chain Resilience The **Critical Entities Resilience (CER) Directive** places strict demands on critical infrastructure operators across the EU. One of the core requirements is the ability to **report on compliance**, both internally and to supervisory authorities. The **supply chain** is explicitly identified as a key area of risk. In this article, we explore how critical entities can build compliant reporting practices and which **best practices** to apply for managing third-party risks. ### Reporting Obligations under the CER Directive Critical entities must: - Conduct **risk assessments**, including supply chain risks, - Develop and maintain a **resilience plan**, - **Report significant incidents** to national authorities, - **Demonstrate** the implementation of appropriate technical and organizational measures – including those applied to suppliers and contractors. In practice, this means organizations need a systematic, verifiable approach to monitoring, logging, auditing, and documentation. ### Best Practice 1: Map and Classify Your Supply Chain Start by identifying which suppliers and subcontractors have a direct or indirect impact on your critical operations. Classify them based on: - Criticality to your services, - Geographic exposure (e.g., non-EU entities), - Security posture (e.g., IAM maturity, certifications). Use frameworks like **NIST Cyber Supply Chain Risk Management** or **ISO/IEC 28000** to guide your classification process. ### Best Practice 2: Enforce and Verify Security Clauses Integrate CER-specific requirements into your procurement contracts, such as: - Mandatory **incident reporting** within 24 hours, - Periodic **security audits**, - Access to audit logs or security assessments. Actively verify compliance through vendor security assessments, penetration testing, or automated compliance scanning tools. ### Best Practice 3: Centralize Physical and Digital Access Third-party access to physical infrastructure or digital systems should be managed centrally through **Identity & Access Management (IAM)**. Recommended measures include: - **Time-bound access** based on job role or contract duration, - **Logging of physical access** using smart key systems like **[ASSA ABLOY CLIQ](https://key2xs.com/integrations/assa-abloy-cliq?hsLang=nl)** or **[iLOQ](https://key2xs.com/integrations/iloq?hsLang=nl)**, - Automated **provisioning and deprovisioning** via platforms like **Key2XS**. This significantly reduces the risk of unauthorized access and supports full traceability for compliance reporting. ### Best Practice 4: Standardize Your Reporting Format Ensure you can produce CER-aligned reports quickly and accurately. These reports should include: - **Incident logs** (who, what, when, resolution), - Access logs (employees and contractors), - Audit results, - Evidence of applied controls per vendor. Use tooling that aggregates, timestamps, and structures these logs automatically – ideally integrated with your GRC or IAM platform. ### Continuous Improvement: Beyond Compliance CER compliance is not a one-off exercise but a **continuous process of risk mitigation and improvement**. Establish an annual review cycle where audit results and incident reports are used to refine internal policies and supply chain controls. ### Conclusion Robust CER compliance reporting starts with **transparency** – across your organization and throughout your supply chain. By actively managing third-party risks, automating access controls, and standardizing your reporting practices, you’ll build a resilient infrastructure that meets the directive and withstands modern threats.   **About Key2XS** Key2XS provides a unique SaaS platform for managing **both physical and digital access** within a single IAM-governed environment. With native integrations for ASSA ABLOY CLIQ, Microsoft [Entra ID](https://key2xs.com/integrations/entra-id-iloq?hsLang=nl), and [SailPoint](https://key2xs.com/integrations/sailpoint-iloq?hsLang=nl), we help critical entities achieve full CER compliance – including logging, auditing, and supply chain control. Learn more about Key2XS & CER/[NIS2](https://key2xs.com/nis2-directive?hsLang=nl) at [www.key2xs.com/whitepaper](https://key2xs.com/whitepaper-nis2-cer?hsLang=nl) ![](https://key2xs.com/hubfs/1587550138006.jpeg)![](https://key2xs.com/hubfs/img/niels-bakker.png)![](https://key2xs.com/hubfs/1746630921693.jpeg)![](https://key2xs.com/hubfs/1696359051569.jpeg) **Written by the Key2XS team** Key2XS is founder-run. Questions about this piece land with the people who built the platform. [Talk to us](https://key2xs.com/contact?hsLang=nl). ## Keep reading [![](https://key2xs.com/hubfs/19294161_m.png) **Keeping Rotterdam’s Refineries Safe with Key2XS and Proving CER Compliance**Sep 08, 2025](https://key2xs.com/news/keeping-rotterdams-refineries-safe-with-key2xs-and-proving-cer-compliance?hsLang=nl) [![](https://key2xs.com/hubfs/image.png) **Coordinated Break-In at Power Plant Thwarted by Rapid CRO and CISO Response**Aug 11, 2025](https://key2xs.com/news/coordinated-break-in-at-power-plant-thwarted-by-rapid-cro-and-ciso-response?hsLang=nl) [![](https://key2xs.com/hubfs/300969528_m.png) **How the Key2XS Platform Cuts the Cost of Key Management**Apr 28, 2026](https://key2xs.com/news/how-the-key2xs-platform-cuts-the-cost-of-key-management?hsLang=nl) ## Govern the keys you already have See identity, policy and physical keys in one 30-minute demo, scoped to your estate. 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