--- title: "ETSI EN 319 401 Audit & Conformity Assessment (Evidence Pack + Checklist)" canonical_url: "https://www.sorena.io/artifacts/global/etsi-en-319-401/audit-and-conformity-assessment" source_url: "https://www.sorena.io/artifacts/global/etsi-en-319-401/audit-and-conformity-assessment" author: "Sorena AI" description: "Audit readiness guide for ETSI EN 319 401 Trust Service Providers: how conformity assessment works in practice, what auditors sample." published_at: "2026-03-04" updated_at: "2026-03-04" keywords: - "ETSI EN 319 401 audit" - "ETSI EN 319 401 conformity assessment" - "trust service provider audit readiness" - "evidence pack" - "monitoring and logging REQ-7.9.1" - "incident response REQ-7.9.2" - "24 hour incident reporting REQ-7.9.3" - "vulnerability scan evidence REQ-7.8-13" - "quarterly vulnerability scanning REQ-7.8-14" - "penetration test REQ-7.8-17" - "evidence retention REQ-7.10" - "audit log UTC synchronization REQ-7.10-06" - "Conformity assessment" - "Trust Service Provider" - "Evidence retention" - "Incident reporting" --- **[SORENA](https://www.sorena.io/)** - AI-Powered GRC Platform [Home](https://www.sorena.io/) | [Solutions](https://www.sorena.io/solutions) | [Artifacts](https://www.sorena.io/artifacts) | [About Us](https://www.sorena.io/about-us) | [Contact](https://www.sorena.io/contact) | [Portal](https://app.sorena.io) --- # ETSI EN 319 401 Audit & Conformity Assessment (Evidence Pack + Checklist) Audit readiness guide for ETSI EN 319 401 Trust Service Providers: how conformity assessment works in practice, what auditors sample. *Artifact Guide* *GLOBAL* ## ETSI EN 319 401 Audit + Conformity Assessment Audit readiness for TSPs: evidence packs, sampling, and common findings. If you can produce evidence for REQ-7.8/7.9/7.10 on demand, you can survive most audits and procurement security reviews. Most ETSI EN 319 401 audits fail on operational proof, not on policy intent. Auditors, conformity-assessment bodies, and relying parties ask the same core questions: do you continuously monitor, can you detect and classify incidents, can you report within 24 hours when required, do you scan and test on a defensible cadence, can you prove supplier oversight, and can you retain evidence with reliable UTC time. This page focuses on what gets sampled, what good evidence looks like, and how to avoid repeat findings. ## What auditors typically evaluate (the real scope) Audits focus on whether your control system works in practice and whether evidence is traceable to your scope. The most sampled areas are the operational clauses: network security, vulnerability management, monitoring/logging, incident response/reporting, and evidence retention. Policies matter only as far as they explain and govern the operating reality. A policy with no operational proof is a finding waiting to happen. - Scope: which trust services and systems are in-scope, including external supporting organizations (REQ-6.1-04) - Risk basis: risk assessment and risk treatment decisions driving controls (REQ-5-01 to REQ-5-05) - Operational proof: scans, logs, incident records, and retention integrity (REQ-7.8 to REQ-7.10) - Assessment context: a TSP conformity assessment will usually be framed through EN 319 403-1, so evidence should be structured for external review rather than only internal operations ## Evidence pack structure for defensible evidence Build a single evidence index that maps REQ categories to their proof. The index should be versioned and should link to the newest evidence, with historical evidence retained for trend and legal/procurement needs. Treat the evidence system as an internal product: it needs ownership, change control, and reliability. - REQ map: REQ -> control narrative -> verification method -> evidence links - System diagrams: network zones, trusted channels, production vs dev/test separation, admin network separation - Operations evidence: scan reports, monitoring dashboards, alert triage tickets, incident reports, and post-incident reviews - Retention evidence: log immutability controls, backups/off-site storage, and access control to archives - Supplier and component evidence: outsourcing agreements, cloud controls, and review records where third parties support the trust service *Recommended next step* *Placement: after the template, evidence, or documentation block* ## Keep ETSI EN 319 401 Audit + Conformity Assessment in one governed evidence system SSOT can take ETSI EN 319 401 Audit + Conformity Assessment from reusing this material inside a governed evidence system to a reusable workflow inside Sorena. Teams working on ETSI EN 319 401 can keep owners, evidence, and next steps aligned without copying this guide into separate documents. - [Open SSOT for ETSI EN 319 401 Audit + Conformity Assessment](/solutions/ssot.md): Start from ETSI EN 319 401 Audit + Conformity Assessment and keep documents, evidence, and control records in one governed system. - [Talk through ETSI EN 319 401](/contact.md): Review your current process, evidence gaps, and next steps for ETSI EN 319 401 Audit + Conformity Assessment. ## High-risk findings area #1: vulnerability scanning and penetration testing (REQ-7.8) ETSI EN 319 401 requires regular vulnerability scans on identified public and private IP addresses, with recorded evidence that scans were performed by a competent and independent party. It also recommends quarterly scanning and requires penetration testing after upgrades/modifications that you determine are significant. Auditors will ask two questions: (1) did you scan/test on a credible cadence and scope, and (2) did you remediate or formally accept risk with documented rationale. - Scan scope: inventory of IP ranges/assets included and excluded (with justification) - Competence/independence evidence: vendor qualifications, ethics/code of conduct, and independence statement - Quarterly cadence default: prove frequency or justify a different cadence via risk assessment - Pen test triggers: define what counts as a significant change and keep test + remediation records ## High-risk findings area #2: monitoring/logging and incident response (REQ-7.9) ETSI EN 319 401 expects continuous monitoring/logging, detection/alarms for abnormal activity, and automated processing of audit logs with alerting for critical security events. This means manual log review without tooling is rarely defensible. Incident response expectations include containment/eradication/recovery, communication plans, training/competence, documentation throughout detection/response, and explicit time-bound handling such as 48-hour critical vulnerability handling and 24-hour breach notification procedures for significant impact breaches. - Log coverage proof: network traffic, privileged actions, config changes, backups, and security-relevant logs (REQ-7.9.1-04) - Alerting proof: alarms for abnormal activity and automated log processing (REQ-7.9.1-03/05) - Critical vulnerability clock: prove how you meet 48-hour handling for critical vulnerabilities (REQ-7.9.2-09) - 24-hour reporting readiness: breach notification procedure and evidence of execution during incidents (REQ-7.9.3-01) ## High-risk findings area #3: evidence retention and time integrity (REQ-7.10) Evidence retention is both a security and legal/continuity requirement. ETSI EN 319 401 requires recording and keeping relevant information accessible for an appropriate period (including after TSP activities cease), while preserving confidentiality and integrity. A frequently missed detail: audit log event time must be synchronized with UTC at least once a day. If time integrity is weak, incident timelines and legal evidence become disputable. - Retention schedule: defined per log category and aligned to terms and conditions (REQ-6.2 and REQ-7.10-07) - Tamper resistance: logs/events cannot be easily deleted/destroyed; reliable transfer to long-term media (REQ-7.10-08) - UTC sync evidence: daily synchronization records and monitoring for drift (REQ-7.10-06) - Access governance: who can view archives/audit logs (system auditors) and how access is approved and reviewed ## Audit readiness checklist (copy/paste) Use this checklist as an internal readiness gate before a conformity assessment, customer audit, or supervisory review. Every item should map to evidence links in your evidence index. - Scope pack: service inventory, system boundary, external support obligations, and current diagrams - Risk pack: current risk assessment, risk treatment plan, and management approvals - Policy pack: practice statement, terms & conditions (incl. log retention), information security policy and change communications - Network security pack: zone segmentation, rule-set reviews, disabled services list, trusted channel proof - Security testing pack: vuln scan reports + independence evidence + remediation, pen test reports + remediation - Monitoring/incident pack: log coverage proof, alerting rules, incident runbooks, communication plans, incident records - Evidence retention pack: retention schedule, immutability controls, UTC sync logs, and archive access control records ## High-risk findings area #4: supplier and outsourced component governance Modern TSP environments rely on cloud infrastructure, managed services, external trust service components, and other outsourced support. EN 319 401 makes clear that the TSP retains overall responsibility for conformance when those arrangements exist. Auditors increasingly sample whether supplier controls are active in practice. They look for more than contracts. They want review records, service-level enforcement, and evidence that supplier cybersecurity practices are revisited after incidents and major changes. - Agreement evidence: contracts, service levels, security clauses, and audit rights where relevant - Operational oversight: review cadence, issue logs, supplier risk assessments, and change notifications - Incident linkage: proof that supplier-related incidents trigger reassessment and corrective action - Boundary clarity: which controls stay with the TSP and which controls are implemented by suppliers ## Primary sources - [ETSI EN 319 401 V3.1.1 (Official PDF via ETSI Deliver)](https://www.etsi.org/deliver/etsi_en/319400_319499/319401/03.01.01_60/en_319401v030101p.pdf?ref=sorena.io) - Primary source for audit-relevant requirements such as REQ-7.8 (scanning/pen testing), REQ-7.9 (monitoring/incidents/reporting), and REQ-7.10 (evidence retention and UTC sync). - [ETSI EN 319 403-1 (Official PDF via ETSI Deliver)](https://www.etsi.org/deliver/etsi_en/319400_319499/31940301/01.05.01_60/en_31940301v010501p.pdf?ref=sorena.io) - Context for how conformity assessment bodies assess Trust Service Providers. - [ETSI IPR Database](https://ipr.etsi.org/?ref=sorena.io) - IPR due diligence reference for ETSI deliverables. ## Related Topic Guides - [ETSI EN 319 401 Compliance Playbook for Trust Service Providers (TSPs)](/artifacts/global/etsi-en-319-401/compliance.md): How to operationalize ETSI EN 319 401 compliance for Trust Service Providers: scope definition, governance, risk assessment to control mapping. - [ETSI EN 319 401 FAQ for Trust Service Providers (TSPs)](/artifacts/global/etsi-en-319-401/faq.md): Frequently asked questions about ETSI EN 319 401 for Trust Service Providers: what a Trust Service Practice Statement is, how risk assessment drives controls. - [ETSI EN 319 401 Requirements (REQ-5/6/7 Map for Trust Service Providers)](/artifacts/global/etsi-en-319-401/requirements.md): Clause-by-clause ETSI EN 319 401 requirements mapping for Trust Service Providers (TSPs): risk assessment (REQ-5). - [ETSI EN 319 401 vs eIDAS (Mapping to Article 19 & 24 TSP Obligations)](/artifacts/global/etsi-en-319-401/etsi-en-319-401-vs-eidas.md): Practical mapping of ETSI EN 319 401 requirements to the EU eIDAS Regulation (EU) No 910/2014. --- [Privacy Policy](https://www.sorena.io/privacy) | [Terms of Use](https://www.sorena.io/terms-of-use) | [DMCA](https://www.sorena.io/dmca) | [About Us](https://www.sorena.io/about-us) (c) 2026 Sorena AB (559573-7338). All rights reserved. Source: https://www.sorena.io/artifacts/global/etsi-en-319-401/audit-and-conformity-assessment