
The moment your vessel connects to a port network, a satellite link,
or a shore-based monitoring system — the attack surface expands dramatically.
UR E27 Items 30–41 address exactly this: 12 additional requirements that
activate when your CBS interfaces with untrusted networks.
These go beyond what UR E26 covers for onboard systems alone.
🔗 THE 12 UNTRUSTED NETWORK REQUIREMENTS:
FR1 — Enhanced Authentication (6 requirements)
- Multi-Factor Authentication required for all external access (SR 1.1 RE2)
— OTP, certificate, biometric. A password alone is not enough.
- Software process and device authentication — not just humans (SR 1.2)
- Consecutive failed login attempts must be limited and locked (SR 1.11)
- System use notification must display before authentication (SR 1.12)
- ALL access via untrusted networks must be monitored and controlled (SR 1.13)
- 🚨 Explicit on-board approval required before any untrusted access is granted (SR 1.13 RE1)
— This means shore cannot remotely access CBS without an authorized crew member approving it first.
FR2 — Remote Session Management (1 requirement)
- Remote Session Termination (SR 2.6): Auto-terminate after configurable inactivity OR manual termination by the session initiator.
FR3 — Enhanced Integrity (4 requirements)
- Cryptographic Integrity Protection (SR 3.1 RE1): Use cryptographic mechanisms to detect modifications over untrusted connections.
- Input Validation (SR 3.5): Validate syntax, length, and content of all process control inputs.
- Session Integrity (SR 3.8): Protect session integrity; reject invalid session IDs.
- Session ID Invalidation (SR 3.8 RE1): Invalidate session IDs on user logout or session termination.
FR7 — Network Security Configuration (1 requirement)
- Network & Security Config Settings (SR 7.6): Provide capability to configure traffic and verify current settings.
---
This completes the 5-part breakdown of all 41 IACS UR E27 security requirements.
The bottom line: maritime cyber resilience is no longer optional.
UR E27 + IEC 62443-3-3 provides the framework. The compliance clock is running.
What's your organization's current E27 readiness posture?
Drop a comment below — I'd like to hear from shipowners, integrators, and class societies.
#MaritimeCyberSecurity #IACS #URE27 #IEC62443 #OTSecurity #ShipSecurity
#CyberResilience #MarineCompliance #RemoteAccess #ZeroTrust
'Security > Maritime Cyber Security' 카테고리의 다른 글
| [IACS UR E27] FR1 Identification & Authentication - Account Management (0) | 2026.05.09 |
|---|---|
| IACS UR E27 - FR1 Human User Identification & Authentication (0) | 2026.05.08 |
| IACS UR E27 - FR6 + FR7: Event Response & Availability (0) | 2026.05.08 |
| IACS UR E27 - FR3 + FR4: System Integrity & Data Confidentiality (0) | 2026.05.08 |
| IACS UR E27 - FR1 + FR2: Identity & Use Control (0) | 2026.05.08 |