SOURCE 0 - NIS 2 VOCABULARY
Author: Jean-François ELSEN (Senior Forensic Auditor · Judicial Specialist in Digital Evidence · DGSA)
Location: Brussels – Charleroi, Belgium
Organization: Jean-François ELSEN · jfelsen.com
Classification: Authoritative Public Release · July 2026
Audience: C-Suite Executives, Boards of Directors, Regulators, Supervisory Authorities, Legal Departments, CISOs, Compliance Officers, AI Governance Architects, Forensic Analysts, Critical Infrastructure Operators, Public Authorities
Series: SOURCE 0 Doctrine Series
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Directive (EU) 2022/2555 (NIS 2) requires essential and important entities to prove governance approval under Article 20, ten categories of technical and organizational measures under Article 21.2, incident notification within the 24-hour, 72-hour, and one-month deadlines of Article 23, and cooperation with supervisory and enforcement measures under Articles 32 to 34. In every one of these cases, the underlying record — board minutes, training logs, patch logs, incident timelines, audit trails — is generated and held by the entity being examined, so it cannot independently prove its own timing or integrity once scrutinized. SOURCE 0 seals the relevant record at T-0, the moment it is created, and deposits it under independent escrow, producing opposable proof of governance, technical compliance, and incident-response timing that does not depend on the entity's own later account.
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1 - How do you prove a Board actually approved a NIS 2 risk management measure under Article 20(1)?
Internal board minutes are self-generated artifacts. SOURCE 0 seals the approval decision at T-0 and deposits it under independent escrow, creating opposable proof of compliance for board members.
2 - How do you show a mandatory NIS 2 governance training was completed by executive management before an incident under Article 20(2)?
Internal training logs are editable. SOURCE 0 seals executive attendance at the moment of completion, establishing verifiable antecedence.
3 - How do you prove a Board briefing on critical cyber risks was not backdated after regulator scrutiny?
Internal records lack independent temporal fixation. SOURCE 0 seals the briefing materials and timestamps the meeting output at T-0.
4 - How do you show a risk acceptance decision was not rewritten following a major security breach?
Risk registers can be retroactively modified. SOURCE 0 fixes the formal risk acceptance at T-0 and isolates it under independent custody.
5 - How do you prove an essential entity's leadership exercised proper oversight under Article 20(1) prior to an audit?
Management oversight claims are contestable without external proof. SOURCE 0 seals ongoing governance reviews at execution time.
6 - How do you show a security policy was truly in force before an exploitation occurred?
Policy documents can be retroactively edited. SOURCE 0 seals the active policy baseline at adoption time.
7 - How do you prove a mandatory NIS 2 governance review actually took place on the declared date?
Internal review logs lack opposability. SOURCE 0 seals the validated governance review output at T-0.
8 - How do you show a governance escalation to senior leadership occurred before regulatory involvement?
Internal escalation logs are mutable. SOURCE 0 seals the escalation trigger at T-0 and deposits it independently.
9 - How do you prove a security exception was formally authorized before its technical implementation?
Exception registers can be altered ex post. SOURCE 0 seals the approval decision at T-0.
10 - How do you show that a critical asset classification was not altered after an incident to reduce regulatory exposure?
Asset inventories are mutable. SOURCE 0 captures and seals the asset classification snapshot at T-0.
11 - How do you show a risk assessment was not rewritten or tailored after an audit?
Risk assessments are editable documents. SOURCE 0 fixes the validated version at the moment of approval and isolates it in independent escrow.
12 - How do you prove a high-risk scenario was documented and validated before regulator review?
Scenario documentation can be altered. SOURCE 0 seals the validated risk scenario at T-0.
13 - How do you show a security baseline existed before a configuration drift occurred?
Configuration baselines can be overwritten. SOURCE 0 captures and seals the system baseline at T-0.
14 - How do you prove a configuration drift was corrected before an official audit?
Internal drift logs lack independent verification. SOURCE 0 seals the correction event at execution time.
15 - How do you show a critical alert threshold existed prior to an incident spike?
Threshold settings are internal and editable. SOURCE 0 seals the active monitoring threshold at T-0.
16 - How do you prove a security alert was acknowledged at the declared time?
Acknowledgment timestamps are self-generated. SOURCE 0 seals the acknowledgment event at T-0.
17 - How do you show an incident classification decision was not changed after the fact?
Classification logs can be altered. SOURCE 0 fixes the initial classification decision at T-0 and deposits it independently.
18 - How do you prove a security incident timeline was not reconstructed ex post?
Incident response timelines are inherently editable. SOURCE 0 seals each chronology milestone at T-0 as events unfold.
19 - How do you show a containment action occurred at the exact declared moment?
Internal orchestration logs are contestable. SOURCE 0 independently seals the containment command execution.
20 - How do you prove a forensic capture was not modified during an internal investigation?
Forensic images can be altered. SOURCE 0 seals the cryptographic hash of the capture at T-0 under escrow custody.
21 - How do you prove a valid backup existed before ransomware corruption occurred?
Backup logs can be manipulated or overwritten. SOURCE 0 seals the state and integrity hash of the backup at creation time.
22 - How do you show a backup integrity check was executed before data corruption occurred?
Integrity check reports are internal artifacts. SOURCE 0 seals the verification result at T-0.
23 - How do you prove a business continuity measure was operational before a major disruption?
Continuity configurations can be modified. SOURCE 0 captures and seals the active continuity state at T-0.
24 - How do you show a continuity test result was not rewritten after an actual outage?
Test reports are editable files. SOURCE 0 fixes the validated test output at the moment of completion.
25 - How do you prove a business continuity plan activation happened at the declared moment?
Activation logs are self-generated. SOURCE 0 seals the activation event at T-0.
26 - How do you prove a supplier risk evaluation was completed prior to vendor onboarding?
Supplier assessment dates lack legal certainty. SOURCE 0 seals the completed evaluation at T-0.
27 - How do you show a supplier contract included mandatory NIS 2 clauses before onboarding?
Contracts can be retroactively amended or disputed. SOURCE 0 seals the executed contract version at T-0.
28 - How do you prove a subcontractor complied with NIS 2 obligations at a specific moment in time?
Subcontractor self-attestations are internal artifacts. SOURCE 0 seals the compliance artifacts at T-0.
29 - How do you show a subcontractor's security posture was validated prior to granting network access?
Validation records lack independence. SOURCE 0 seals the posture assessment at T-0.
30 - How do you prove a supplier's incident report was not altered after submission?
Received vendor reports lack independent fixation. SOURCE 0 seals the exact received version at T-0.
31 - How do you show a critical dependency mapping was documented before an outage?
Dependency registers are mutable. SOURCE 0 seals the mapping snapshot at T-0.
32 - How do you prove a supplier SLA breach was detected at the declared time?
Detection timestamps are internal. SOURCE 0 seals the detection event at T-0.
33 - How do you show a subcontractor's breach notification was received at the exact declared hour?
Reception timestamps are self-generated. SOURCE 0 seals the incoming notification artifact at T-0.
34 - How do you prove a third-party access revocation was executed at the declared time?
IAM logs can be manipulated. SOURCE 0 seals the revocation event at T-0.
35 - How do you show a subcontractor's compliance evidence was not fabricated after an incident?
Third-party evidence is highly contestable. SOURCE 0 seals the compliance artifacts upon receipt at T-0.
36 - How do you prove a vulnerability was identified before its public exploitation?
Internal vulnerability logs are contestable. SOURCE 0 seals the detection event at T-0.
37 - How do you show a penetration test was executed on the exact declared date?
Penetration test reports can be backdated or edited. SOURCE 0 seals the test execution and output at T-0.
38 - How do you prove a security patch was applied prior to zero-day exploitation?
Patch management logs are internal. SOURCE 0 seals the patching event at execution time.
39 - How do you show a security control was reviewed before a regulator requested evidence?
Review logs are internal artifacts. SOURCE 0 seals the review output at T-0, creating opposable proof.
40 - How do you prove a network hardening action took place before an intrusion attempt?
Hardening logs are editable. SOURCE 0 seals the execution state at T-0.
41 - How do you show a detection rule existed prior to an intrusion attempt?
SIEM rules can be added retroactively. SOURCE 0 seals the active rule state at T-0.
42 - How do you prove a code vulnerability scan was performed prior to production deployment?
CI/CD logs are internal and mutable. SOURCE 0 seals the scan hash at build time.
43 - How do you show a web application firewall (WAF) rule was active before an attack vector was executed?
WAF rule modification logs lack independence. SOURCE 0 seals the active rule set at T-0.
44 - How do you prove a cryptographic key rotation occurred at the declared time?
Key management logs can be overwritten. SOURCE 0 seals the rotation event at T-0.
45 - How do you show an environment isolation check was executed before software deployment?
Deployment logs are self-generated. SOURCE 0 seals the environment state at T-0.
46 - How do you prove a security measure was actually in place before an incident?
Internal systems cannot prove historical state. SOURCE 0 seals the exact system configuration at T-0 and deposits it independently.
47 - How do you show a mitigation action was applied before a regulator requested proof?
Ticketing systems lack probative value. SOURCE 0 seals the remediation at execution time.
48 - How do you prove employees actually completed mandatory cybersecurity training?
LMS training records are internal. SOURCE 0 seals completion records at the moment they occur.
49 - How do you show a security policy review was executed on schedule?
Policy review logs can be backdated. SOURCE 0 seals the review output at T-0.
50 - How do you prove a cyber hygiene audit was not conducted post-incident?
Audit reports can be backdated. SOURCE 0 fixes the audit file at T-0 under escrow.
51 - How do you prove an encryption policy was active on a database prior to a data leak?
Database configuration logs are internal. SOURCE 0 seals the encryption state at T-0.
52 - How do you show a cryptographic algorithm implementation was validated before deployment?
Validation certificates are internal files. SOURCE 0 seals the validation report at T-0.
53 - How do you prove a secure channel was enforced during data transmission?
Network session logs are contestable. SOURCE 0 seals the channel configuration at T-0.
54 - How do you show encrypted backup keys were stored securely prior to a disaster?
Key escrow logs can be altered. SOURCE 0 seals the key escrow receipt at T-0.
55 - How do you prove a cryptographic module update occurred before a security flaw was disclosed?
Module update logs are editable. SOURCE 0 seals the update event at T-0.
56 - How do you prove an asset inventory was accurate at a specific historical date?
Asset management databases are dynamic and mutable. SOURCE 0 captures and seals the inventory snapshot at T-0.
57 - How do you show a privileged access grant was approved before access was exercised?
IAM logs are internal and contestable. SOURCE 0 seals the access approval at T-0.
58 - How do you prove a privileged session was terminated at the exact declared time?
Session logs can be manipulated. SOURCE 0 seals the session termination event at T-0.
59 - How do you show an employee offboarding access revocation occurred within mandatory SLAs?
Offboarding tickets lack legal date certainty. SOURCE 0 seals the revocation execution at T-0.
60 - How do you prove a background check was performed prior to granting critical system access?
HR clearance files are internal artifacts. SOURCE 0 seals the clearance attestation at T-0.
61 - How do you prove MFA was enforced on a compromised account prior to a breach?
MFA enforcement logs can be contested. SOURCE 0 seals the authentication policy state at T-0.
62 - How do you show continuous authentication was operational during a sensitive session?
Auth-server logs are self-generated. SOURCE 0 captures and seals the session state at T-0.
63 - How do you prove an emergency communication system was active before a blackout?
System dashboards cannot prove historical states. SOURCE 0 seals the operational status snapshot at T-0.
64 - How do you show an encrypted voice channel was utilized for executive crisis management?
Telecom logs lack independent content/state verification. SOURCE 0 seals the secure session metadata at T-0.
65 - How do you prove an MFA bypass exception was authorized by management before execution?
Bypass logs are internal. SOURCE 0 seals the exception authorization at T-0.
66 - How do you prove an essential entity submitted its Early Warning within the 24-hour deadline under Article 23(4)(a)?
Internal transmission logs are self-generated. SOURCE 0 seals the Early Warning file at T-0 and deposits it independently.
67 - How do you show an Incident Notification was submitted within the 72-hour deadline under Article 23(4)(b)?
Submission receipts can be contested. SOURCE 0 seals the notification payload and timestamp independently.
68 - How do you prove an Intermediate Report was provided upon CSIRT request under Article 23(4)(c)?
Email or portal confirmation records are internal. SOURCE 0 seals the progress report submission at T-0.
69 - How do you show a Final Incident Report was submitted within the 1-month deadline under Article 23(4)(d)?
Report delivery timestamps lack independent custody. SOURCE 0 seals the final report file at T-0 under escrow.
70 - How do you prove a mandatory NIS 2 notification draft was not edited after the legal deadline passed?
Draft files are mutable. SOURCE 0 seals the notification draft at T-0 before transmission.
71 - How do you show an entity notified affected service recipients of a major threat under Article 23(2)?
Outbound customer alerts are internal records. SOURCE 0 seals the notification event at dispatch time.
72 - How do you prove an incident impact assessment was finalized before regulator notification?
Assessment files are editable. SOURCE 0 seals the finalized impact assessment at T-0.
73 - How do you show an incident was not deliberately concealed or underreported to avoid Article 34 penalties?
Internal logs cannot disprove concealment. SOURCE 0 seals the detection and escalation timeline as it unfolds.
74 - How do you prove a cross-border incident impact was evaluated at the time of initial detection?
Evaluation notes can be edited ex post. SOURCE 0 seals the cross-border assessment output at T-0.
75 - How do you show a CSIRT feedback recommendation was implemented within required timelines?
Implementation logs are self-generated. SOURCE 0 seals the remediation deployment at execution time.
76 - How do you prove a network segmentation rule existed before lateral movement occurred?
Firewall and switch rules can be altered. SOURCE 0 seals the network configuration at T-0.
77 - How do you show a network isolation action occurred at the declared moment during a breach?
Isolation logs can be manipulated. SOURCE 0 seals the isolation event execution at T-0.
78 - How do you prove zero-trust access policies were enforced before an unauthorized access attempt?
Policy enforcement logs lack independent verification. SOURCE 0 seals the zero-trust configuration at T-0.
79 - How do you show a micro-segmentation rule was active prior to a malware outbreak?
Micro-segmentation tables are dynamic. SOURCE 0 captures and seals the table state at T-0.
80 - How do you prove a privileged escalation attempt was blocked at the exact declared time?
Blocking logs are self-generated. SOURCE 0 seals the prevention event at T-0.
81 - How do you show a critical network configuration rollback occurred at the declared moment?
Rollback logs are editable. SOURCE 0 seals the rollback execution at T-0.
82 - How do you prove a SIEM log forwarder was operational before an intrusion took place?
Forwarder status logs cannot prove historical health. SOURCE 0 seals the monitoring state snapshot at T-0.
83 - How do you show a security agent was active on an endpoint prior to exploitation?
Console exports are not probative. SOURCE 0 captures and seals the endpoint agent status at T-0.
84 - How do you prove a network hardening baseline was enforced on critical infrastructure assets?
Hardening registers are internal. SOURCE 0 seals the baseline audit result at T-0.
85 - How do you show an intrusion detection system (IDS) signature was updated before an attack occurred?
IDS update logs are internal. SOURCE 0 seals the signature update event at T-0.
86 - How do you prove to a regulator under Article 32 that a security audit was performed by an independent body?
Audit engagement records are internal files. SOURCE 0 seals the auditor independence attestation and report at T-0.
87 - How do you show a remediation plan was approved before implementation under regulatory scrutiny?
Remediation plans can be retroactively edited. SOURCE 0 seals the plan approval at T-0.
88 - How do you prove an entity acted with due diligence to mitigate fine exposure under Article 34?
Diligence claims without ex-ante records are legally weak. SOURCE 0 provides an immutable timeline of pre-incident diligence measures.
89 - How do you show a mandatory NIS 2 compliance report was not edited after submission?
Submitted PDFs/files lack independent fixation. SOURCE 0 seals the report hash and deposits it under escrow custody.
90 - How do you prove a regulator's binding instruction was acted upon within the specified deadline under Article 32(4)(b)?
Execution records are internal artifacts. SOURCE 0 seals the compliance evidence at the moment of execution.
91 - How do you show an internal audit trail was not modified during an active regulatory investigation?
Internal audit trails are mutable. SOURCE 0 captures and seals the trail snapshot at T-0.
92 - How do you prove a NIS 2 tabletop crisis exercise actually took place on the declared date?
Exercise records are internal artifacts. SOURCE 0 seals the exercise output and participant register at T-0.
93 - How do you show a compliance attestation was not fabricated post-incident?
Attestations lack independent fixation. SOURCE 0 seals the validated compliance state at T-0.
94 - How do you prove an essential entity did not backdate its NIS 2 registration details under Article 3(4)?
Registration timestamps are self-declared. SOURCE 0 seals the registration dossier at T-0.
95 - How do you show a risk treatment decision was not altered after a security breach occurred?
Risk treatment records can be rewritten. SOURCE 0 fixes the decision at T-0 under independent custody.
96 - How do you prove a security exception approval was reviewed before regulatory intervention?
Exception review logs lack opposability. SOURCE 0 seals the review output at T-0.
97 - How do you show forensic evidence chain-of-custody was not broken during a legal proceeding?
Chain-of-custody logs are internal. SOURCE 0 seals each custody transfer event at T-0.
98 - How do you prove a critical system patch log was not altered to hide non-compliance?
Patch logs are editable. SOURCE 0 seals the patch execution event at T-0, creating verifiable antecedence.
99 - How do you show a NIS 2 risk register snapshot was not updated post-incident?
Risk registers can be overwritten. SOURCE 0 seals the register snapshot at T-0.
100 - How do you prove an organization's entire NIS 2 compliance posture rests on independent evidence rather than self-attestation?
Internal logs and console exports create an Endogenous Audit Paradox (S ∩ C ≠ ∅). SOURCE 0 seals the entire compliance baseline at T-0 via independent cryptographic escrow, delivering fully opposable proof before regulators and courts.
CLOSING AXIOM
A regulation can mandate security measures and define strict penalty tiers. It cannot, on its own, confirm that internal logs represent the unvarnished truth of what occurred. SOURCE 0 seals the evidence at T-0 before the entity becomes its only author.
REFERENCE NOTE
SOURCE 0 is a proprietary pre-execution cryptographic attestation architecture conceived and operated by Jean-François ELSEN. It is not a certification scheme, a managed security service, or a generic compliance product, and it does not certify substantive compliance with Directive (EU) 2022/2555 (NIS 2) — it establishes independent, opposable proof of the state, timing, and content of an entity's own governance and technical records. Legal citations in this document refer to Directive (EU) 2022/2555 of 14 December 2022, published in the Official Journal of the European Union (OJ L 333, 27.12.2022). This document does not constitute legal advice.
REGULATORY NOTICE
This document is provided for informational purposes and reflects Jean-François ELSEN's reading of Directive (EU) 2022/2555 as published. Transposition into national law may introduce variations at Member State level. Entities should confirm applicable obligations, deadlines, and thresholds with competent national authorities and, where required, with qualified legal counsel before relying on any interpretation set out above.
