oSIST prEN 304 625 V1.0.0:2026

• Abstract:

  DEN/CYBER-EUS-0017

• Status: Not Published
• Public Enquiry End Date: 31-Oct-2026
• ICS: 35.030 - IT Security
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 10-Aug-2026
• Due Date: 28-Dec-2026
• Ref Project: ETSI EN 304 625 V1.0.0 (2026-08) - Cyber Security (CYBER); CRA; Cybersecurity requirements for physical and virtual network interfaces

Overview

oSIST prEN 304 625 V1.0.0:2026 is a harmonized European standard developed by SIST under the ETSI framework, focusing on cybersecurity requirements for physical and virtual network interfaces. This document defines baseline security expectations and guidelines to ensure that both hardware-based and software-based (virtual) network interfaces are secure throughout their lifecycle. It provides a structure for manufacturers, developers, and system integrators to assess, implement, and demonstrate conformity with the latest European cybersecurity regulations, including alignment with the Cyber Resilience Act (CRA).

With the rapid expansion of connected devices and digital infrastructure, robust security measures for network interfaces are crucial to minimize attack surfaces and protect against cyber threats. This standard establishes requirements for security functionalities, resilience against vulnerabilities, secure configurations, updates, authentication, data protection, and compliance assessment.

Key Topics

• Cybersecurity for Physical and Virtual Interfaces: Addresses security measures for network interface cards, wireless interfaces, device drivers, virtual network cards, and similar hardware/software-based connections.
• Technical Requirements: Defines mandatory security controls for product design, configuration, deployment, and ongoing operation, including:
  • Protection against known vulnerabilities
  • Secure default configurations
  • Regular security updates
  • Authentication and access management
  • Confidentiality, integrity, and data minimization
  • Availability and non-interference
  • Logging and monitoring practices
  • Factory reset and secure data deletion
• Operational Environment: Contextualizes interface deployment scenarios in IoT, industrial, consumer, telecom, and enterprise products, considering both hardware (e.g., routers, smart meters) and virtualized (e.g., VMs, data centers) use cases.
• Compliance and Assessment: Outlines objective assessment criteria and evidence requirements for products to demonstrate compliance with each technical measure.

Applications

The oSIST prEN 304 625 V1.0.0:2026 standard is relevant across a spectrum of sectors and use cases involving network-connected devices, including but not limited to:

• Internet of Things (IoT): Ensures secure network interface configurations in smart home devices, industrial sensors, and remote monitoring equipment.
• Telecommunications: Guides secure implementation of wired and wireless access points, routers, and edge devices in telecom networks.
• Data Centers and Virtual Environments: Supports security in virtual network cards and interfaces within multi-tenant, cloud, or enterprise environments.
• Consumer Electronics: Applies to devices like smart meters, vending machines, ATMs, smart watches, and mobile phones to safeguard network operations and data integrity.
• Critical and Industrial Systems: Facilitates defense in depth for networked control systems and connected infrastructure components, addressing requirements like data minimization and attack surface reduction.

Manufacturers and system integrators can leverage this standard to demonstrate compliance with European cybersecurity legislation and build secure-by-design networked products.

Related Standards

Organizations working to implement oSIST prEN 304 625 V1.0.0:2026 for physical and virtual network interface security should also consider the following related standards:

• EN 303 645: Cyber Security for Consumer Internet of Things
• ISO/IEC 27001: Information Security Management Systems
• IEC 62443: Industrial Network and System Security
• ETSI EN 330 529: Cybersecurity assessment for ICT products
• EN 301 489 Series: Electromagnetic compatibility for ICT equipment

Ensuring alignment with these standards can support holistic security management and strengthen trust in digital products, both at the device level and across broader digital ecosystems.

---

Keywords: cybersecurity requirements, network interface security, Cyber Resilience Act (CRA), physical network interface, virtual network interface, IoT security, compliance assessment, SIST, ETSI, European standards.

Draft ETSI EN 304 625 V1.0.0 (2026-08)

HARMONISED EUROPEAN STANDARD
Cyber Security (CYBER); CRA;
Cybersecurity requirements for physical and
virtual network interfaces
2 Draft ETSI EN 304 625 V1.0.0 (2026-08)

Reference
DEN/CYBER-EUS-0017
Keywords
CRA, cybersecurity, interface
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information; or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part of this document may be reproduced in any form, by any means and in any media, without the prior written
authorization of ETSI and except as expressly permitted below.
By way of exception and when the document is a normative deliverable (European Standard (EN),
Technical Specification (TS), Group Specification (GS) or ETSI Standard (ES)), ETSI authorizes to reproduce
and incorporate into products, services and technical documentation only those extracts (e.g. templates) that are strictly
necessary for the technical implementation of the normative deliverable, to ensure compliance with the latter.
Nothing in this notice shall be construed as limiting any mandatory exceptions to copyright provided by applicable law.

© ETSI 2026.
All rights reserved.
ETSI
3 Draft ETSI EN 304 625 V1.0.0 (2026-08)
Contents
Intellectual Property Rights . 15
Foreword . 15
Modal verbs terminology . 16
Introduction . 16
1 Scope . 17
2 References . 17
2.1 Normative references . 17
2.2 Informative references . 18
3 Definition of terms, symbols and abbreviations . 19
3.1 Terms . 19
3.2 Symbols . 20
3.3 Abbreviations . 20
4 Product context . 20
4.0 Introduction . 20
4.1 Product Functions . 21
4.1.1 Physical network interface product functions . 21
4.1.2 Device driver product functions . 22
4.1.3 Virtual network interface product functions . 22
4.2 Product Architecture. 22
4.2.1 Overview . 22
4.2.2 Types of network interface . 22
4.2.3 Device drivers for network interfaces . 24
4.3 Operational Environment . 25
4.3.1 General description . 25
4.3.2 Physical/Hardware environment . 25
4.3.3 Logical/Software environment. 25
4.3.4 Connectivity aspects . 26
4.4 Distribution of Security Functions . 26
4.4.1 General . 26
4.4.2 Security functions provided outside the product . 26
4.4.3 Security functions provided to other components . 26
4.5 Users . 27
4.6 Use Cases . 27
4.6.1 Introduction. 27
4.6.1.1 Overview . 27
4.6.1.2 Guidance . 28
4.6.2 Use case descriptions . 28
4.6.2.1 UC-VI-ISO: Virtual interface for research within a host system . 28
4.6.2.2 UC-PH-VNI: Vending machine internal network . 28
4.6.2.3 UC-PH-VNC: Vending machine, remotely managed . 29
4.6.2.4 UC-PH-IOT: Physical network interface for home IoT . 29
4.6.2.5 UC-PH-IRO: Intranet router. 29
4.6.2.6 UC-PH-EDG: Edge router . 30
4.6.2.7 UC-PH-HRO: Home router in filtered network . 30
4.6.2.8 UC-PH-ISP: ISP access point . 30
4.6.2.9 UC-VI-VDC: Virtualize data centre . 31
4.6.2.10 UC-VI-VMW: VM on multi-tenant web server . 31
4.6.2.11 UC-VI-VMC: Virtualize critical server . 31
4.6.2.12 UC-VI-VII: Virtual interface for integrators . 32
4.6.2.13 UC-PH-SMW: Smart watch . 32
4.6.2.14 UC-PH-SME: Smart meter . 33
4.6.2.15 UC-PH-ATM: ATM. 33
4.6.2.16 UC-PH-SPI: Solar panel inverter . 33
4.6.2.17 UC-VI-VPN: Consumer VPN . 34
ETSI
4 Draft ETSI EN 304 625 V1.0.0 (2026-08)
4.6.2.18 UC-PH-MOB: Mobile phone or tablet . 34
4.6.2.19 UC-PH-GPI: General purpose integrated . 34
4.6.2.20 UC-PH-USB: External USB . 35
4.6.2.21 UC-PH-STA: Standalone . 35
4.6.2.22 UC-PH-SNS: Remote Sensor . 35
5 Technical requirements for products . 36
5.1 Introduction . 36
5.1.1 Applicability of the requirements . 36
5.1.2 Applicability of Annex K . 36
5.1.3 Applicability of Annex R . 36
5.1.4 Guidance for "cybersecurity-relevant" . 36
5.2 Appropriate level of cybersecurity . 37
5.2.1 Overview . 37
5.2.1.1 CRA Relevance . 37
5.2.2 REQ-ALC-01 Resilience to potentially untrusted inputs . 37
5.2.2.1 Requirement . 37
5.2.2.2 Applicability. 37
5.2.3 Mapping of requirements to use cases . 38
5.3 No known exploitable vulnerabilities . 38
5.3.1 Overview . 38
5.3.2 REQ-KEV-01 No known exploitable vulnerabilities . 38
5.3.2.1 Requirement . 38
5.3.2.2 Applicability. 38
5.3.2.3 Guidance . 39
5.3.3 Mapping of requirements to use cases . 40
5.4 Secure by default configuration . 40
5.4.1 Overview . 40
5.4.2 REQ-SBD-01: Provide methods to protect or disable interfaces . 40
5.4.2.1 Requirement . 40
5.4.2.2 Applicability. 40
5.4.2.3 Guidance . 41
5.4.3 REQ-SBD-02: Protect or disable access to debug or management interfaces . 41
5.4.3.1 Requirement . 41
5.4.3.2 Applicability. 41
5.4.3.3 Guidance . 42
5.4.4 Mapping of requirements to use cases . 42
5.5 Security updates . 42
5.5.1 Overview . 42
5.5.2 REQ-SU-01: Secure update provided by operational environment . 43
5.5.2.1 Requirement . 43
5.5.2.2 Applicability. 43
5.5.3 Mapping of requirements to use cases . 44
5.6 Authentication and access control . 44
5.6.1 Overview . 44
5.6.2 REQ-AAC-01: Authentication and access control provided by operational environment. 44
5.6.2.1 Requirement . 44
5.6.2.2 Applicability. 44
5.6.3 Mapping of requirements to use cases . 45
5.7 Confidentiality protection . 46
5.7.1 Overview . 46
5.7.2 REQ-CP-01: Confidentiality protection provided by operational environment . 46
5.7.2.1 Requirement . 46
5.7.2.2 Applicability. 46
5.7.2.3 Guidance . 47
5.7.3 Mapping of requirements to use cases . 47
5.8 Integrity protection . 47
5.8.1 Overview . 47
5.8.2 REQ-IP-01: Integrity protection provided by operational environment . 47
5.8.2.1 Requirement . 47
5.8.2.2 Applicability. 47
5.8.3 Mapping of requirements to use cases . 48
ETSI
5 Draft ETSI EN 304 625 V1.0.0 (2026-08)
5.9 Data minimisation . 49
5.9.1 Overview . 49
5.9.2 REQ-DM-01: Data minimisation . 49
5.9.2.1 Requirement . 49
5.9.2.2 Applicability. 49
5.9.3 Mapping of requirements to use cases . 50
5.10 Availability protection . 50
5.10.1 Overview . 50
5.10.2 REQ-AP-01 Fast packet drop . 50
5.10.2.1 Requirement . 50
5.10.2.2 Applicability. 50
5.10.2.3 Guidance . 51
5.10.3 REQ-AP-02 Limit resource usage by incoming network data . 51
5.10.3.1 Requirement . 51
5.10.3.2 Applicability. 51
5.10.4 REQ-AP-03 Availability protection provided by operational environment . 52
5.10.4.1 Requirement . 52
5.10.4.2 Applicability. 52
5.10.5 REQ-AP-04: Watchdog and notification of host . 53
5.10.5.1 Requirement . 53
5.10.5.2 Applicability. 53
5.10.6 REQ-AP-05: Watchdog and self-initiated reset . 54
5.10.6.1 Requirement . 54
5.10.6.2 Applicability. 54
5.10.7 Mapping of requirements to use cases . 55
5.11 Non-interference . 55
5.11.1 Overview . 55
5.11.2 REQ-NI-01: Minimise data transmitted to unverified sources . 55
5.11.2.1 Requirement . 55
5.11.2.2 Applicability. 55
5.11.2.3 Guidance . 56
5.11.3 Mapping of requirements to use cases . 57
5.12 Attack surface minimisation . 57
5.12.1 Overview . 57
5.12.2 REQ-ASM-01: Minimise attack surface . 57
5.12.2.1 Requirement . 57
5.12.2.2 Applicability. 57
5.12.3 Mapping of requirements to use cases . 58
5.13 Exploit mitigation . 58
5.13.1 Overview . 58
5.13.2 Requirements . 58
5.13.3 Mapping of requirements to use cases . 59
5.14 Monitoring . 59
5.14.1 Overview . 59
5.14.2 REQ-MON-01: Logging . 59
5.14.2.1 Requirement . 59
5.14.2.2 Applicability. 59
5.14.3 Mapping of requirements to use cases . 60
5.15 Factory reset and data portability . 60
5.15.1 Overview . 60
5.15.2 REQ-SDT-01 Secure deletion. 61
5.15.2.1 Requirement . 61
5.15.2.2 Applicability. 61
5.15.3 REQ-SDT-02 Secure data read provided by operational environment . 62
5.15.3.1 Requirement . 62
5.15.3.2 Applicability. 62
5.15.4 Mapping of requirements to use cases . 63
6 Assessment criteria for compliance with technical requirements . 63
6.1 Introduction to the assessment and compliance criteria . 63
6.1.1 General . 63
6.1.2 Guidance for identifying interfaces or data processing . 65
ETSI
6 Draft ETSI EN 304 625 V1.0.0 (2026-08)
6.2 Appropriate level of cybersecurity . 65
6.2.1 Overview . 65
6.2.2 REQ-ALC-01 Resilience to potentially untrusted inputs . 65
6.2.2.1 Objective . 65
6.2.2.2 Preparation . 66
6.2.2.3 Activities . 67
6.2.2.4 Verdict . 67
6.2.2.5 Evidence . 67
6.2.2.6 Guidance . 67
6.3 No known exploitable vulnerabilities . 68
6.3.1 Overview . 68
6.3.2 REQ-KEV-01 No known exploitable vulnerabilities . 68
6.3.2.1 Objective . 68
6.3.2.2 Preparation . 68
6.3.2.3 Activities . 68
6.3.2.4 Verdict . 68
6.3.2.5 Evidence . 68
6.3.2.6 Guidance . 69
6.4 Secure by default configuration . 69
6.4.1 Overview . 69
6.4.2 REQ-SBD-01: Provide methods to protect or disable interfaces . 69
6.4.2.1 Objective . 69
6.4.2.2 Preparation . 69
6.4.2.3 Activities . 69
6.4.2.4 Verdict . 69
6.4.2.5 Evidence . 70
6.4.2.6 Guidance . 70
6.4.3 REQ-SBD-02: Protect or disable access to debug or management interfaces . 70
6.4.3.1 Objective . 70
6.4.3.2 Preparation . 70
6.4.3.3 Activities . 70
6.4.3.4 Verdict . 70
6.4.3.5 Evidence . 71
6.5 Security updates . 71
6.5.1 Overview . 71
6.5.2 REQ-SU-01 Secure update provided by operational environment . 71
6.5.2.1 Objective . 71
6.5.2.2 Preparation . 71
6.5.2.3 Activities . 71
6.5.2.4 Verdict . 71
6.5.2.5 Evidence . 71
6.5.2.6 Guidance . 72
6.6 Authentication and access control . 72
6.6.1 Overview . 72
6.6.2 REQ-AAC-01: Authentication and access control provided by operational environment. 72
6.6.2.1 Objective . 72
6.6.2.2 Preparation . 72
6.6.2.3 Activities . 72
6.6.2.4 Verdict . 72
6.6.2.5 Evidence . 72
6.7 Confidentiality protection . 72
6.7.1 Overview . 72
6.7.2 REQ-CP-01: Confidentiality protection provided by operational environment . 73
6.7.2.1 Objective . 73
6.7.2.2 Preparation . 73
6.7.2.3 Activities . 73
6.7.2.4 Verdict . 73
6.7.2.5 Evidence . 73
6.7.2.6 Guidance . 73
6.8 Integrity protection . 74
6.8.1 Overview . 74
6.8.2 REQ-IP-01: Integrity protection provided by operational environment . 74
ETSI
7 Draft ETSI EN 304 625 V1.0.0 (2026-08)
6.8.2.1 Objective . 74
6.8.2.2 Preparation . 74
6.8.2.3 Activities . 74
6.8.2.4 Verdict . 74
6.8.2.5 Evidence . 74
6.8.2.6 Guidance . 74
6.9 Data minimisation . 75
6.9.1 Overview . 75
6.9.2 REQ-DM-01: Minimise data processed . 75
6.9.2.1 Objective . 75
6.9.2.2 Preparation . 75
6.9.2.3 Activities . 75
6.9.2.4 Verdict . 75
6.9.2.5 Evidence . 75
6.9.2.6 Guidance . 76
6.10 Availability protection . 76
6.10.1 Overview . 76
6.10.2 REQ-AP-01 Fast packet drop . 76
6.10.2.1 Objective . 76
6.10.2.2 Preparation .
...

SLOVENSKI STANDARD
01-oktober-2026
Kibernetska varnost (CYBER) - CRA - Zahteve za kibernetsko varnost za fizične in
virtualne omrežne vmesnike
Cyber Security (CYBER) - CRA - Cybersecurity requirements for physical and virtual
network interfaces
Ta slovenski standard je istoveten z: ETSI EN 304 625 V1.0.0 (2026-08)
ICS:
35.030 Informacijska varnost IT Security
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Draft ETSI EN 304 625 V1.0.0 (2026-08)

HARMONISED EUROPEAN STANDARD
Cyber Security (CYBER); CRA;
Cybersecurity requirements for physical and
virtual network interfaces
2 Draft ETSI EN 304 625 V1.0.0 (2026-08)

Reference
DEN/CYBER-EUS-0017
Keywords
CRA, cybersecurity, interface
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information; or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part of this document may be reproduced in any form, by any means and in any media, without the prior written
authorization of ETSI and except as expressly permitted below.
By way of exception and when the document is a normative deliverable (European Standard (EN),
Technical Specification (TS), Group Specification (GS) or ETSI Standard (ES)), ETSI authorizes to reproduce
and incorporate into products, services and technical documentation only those extracts (e.g. templates) that are strictly
necessary for the technical implementation of the normative deliverable, to ensure compliance with the latter.
Nothing in this notice shall be construed as limiting any mandatory exceptions to copyright provided by applicable law.

© ETSI 2026.
All rights reserved.
ETSI
3 Draft ETSI EN 304 625 V1.0.0 (2026-08)
Contents
Intellectual Property Rights . 15
Foreword . 15
Modal verbs terminology . 16
Introduction . 16
1 Scope . 17
2 References . 17
2.1 Normative references . 17
2.2 Informative references . 18
3 Definition of terms, symbols and abbreviations . 19
3.1 Terms . 19
3.2 Symbols . 20
3.3 Abbreviations . 20
4 Product context . 20
4.0 Introduction . 20
4.1 Product Functions . 21
4.1.1 Physical network interface product functions . 21
4.1.2 Device driver product functions . 22
4.1.3 Virtual network interface product functions . 22
4.2 Product Architecture. 22
4.2.1 Overview . 22
4.2.2 Types of network interface . 22
4.2.3 Device drivers for network interfaces . 24
4.3 Operational Environment . 25
4.3.1 General description . 25
4.3.2 Physical/Hardware environment . 25
4.3.3 Logical/Software environment. 25
4.3.4 Connectivity aspects . 26
4.4 Distribution of Security Functions . 26
4.4.1 General . 26
4.4.2 Security functions provided outside the product . 26
4.4.3 Security functions provided to other components . 26
4.5 Users . 27
4.6 Use Cases . 27
4.6.1 Introduction. 27
4.6.1.1 Overview . 27
4.6.1.2 Guidance . 28
4.6.2 Use case descriptions . 28
4.6.2.1 UC-VI-ISO: Virtual interface for research within a host system . 28
4.6.2.2 UC-PH-VNI: Vending machine internal network . 28
4.6.2.3 UC-PH-VNC: Vending machine, remotely managed . 29
4.6.2.4 UC-PH-IOT: Physical network interface for home IoT . 29
4.6.2.5 UC-PH-IRO: Intranet router. 29
4.6.2.6 UC-PH-EDG: Edge router . 30
4.6.2.7 UC-PH-HRO: Home router in filtered network . 30
4.6.2.8 UC-PH-ISP: ISP access point . 30
4.6.2.9 UC-VI-VDC: Virtualize data centre . 31
4.6.2.10 UC-VI-VMW: VM on multi-tenant web server . 31
4.6.2.11 UC-VI-VMC: Virtualize critical server . 31
4.6.2.12 UC-VI-VII: Virtual interface for integrators . 32
4.6.2.13 UC-PH-SMW: Smart watch . 32
4.6.2.14 UC-PH-SME: Smart meter . 33
4.6.2.15 UC-PH-ATM: ATM. 33
4.6.2.16 UC-PH-SPI: Solar panel inverter . 33
4.6.2.17 UC-VI-VPN: Consumer VPN . 34
ETSI
4 Draft ETSI EN 304 625 V1.0.0 (2026-08)
4.6.2.18 UC-PH-MOB: Mobile phone or tablet . 34
4.6.2.19 UC-PH-GPI: General purpose integrated . 34
4.6.2.20 UC-PH-USB: External USB . 35
4.6.2.21 UC-PH-STA: Standalone . 35
4.6.2.22 UC-PH-SNS: Remote Sensor . 35
5 Technical requirements for products . 36
5.1 Introduction . 36
5.1.1 Applicability of the requirements . 36
5.1.2 Applicability of Annex K . 36
5.1.3 Applicability of Annex R . 36
5.1.4 Guidance for "cybersecurity-relevant" . 36
5.2 Appropriate level of cybersecurity . 37
5.2.1 Overview . 37
5.2.1.1 CRA Relevance . 37
5.2.2 REQ-ALC-01 Resilience to potentially untrusted inputs . 37
5.2.2.1 Requirement . 37
5.2.2.2 Applicability. 37
5.2.3 Mapping of requirements to use cases . 38
5.3 No known exploitable vulnerabilities . 38
5.3.1 Overview . 38
5.3.2 REQ-KEV-01 No known exploitable vulnerabilities . 38
5.3.2.1 Requirement . 38
5.3.2.2 Applicability. 38
5.3.2.3 Guidance . 39
5.3.3 Mapping of requirements to use cases . 40
5.4 Secure by default configuration . 40
5.4.1 Overview . 40
5.4.2 REQ-SBD-01: Provide methods to protect or disable interfaces . 40
5.4.2.1 Requirement . 40
5.4.2.2 Applicability. 40
5.4.2.3 Guidance . 41
5.4.3 REQ-SBD-02: Protect or disable access to debug or management interfaces . 41
5.4.3.1 Requirement . 41
5.4.3.2 Applicability. 41
5.4.3.3 Guidance . 42
5.4.4 Mapping of requirements to use cases . 42
5.5 Security updates . 42
5.5.1 Overview . 42
5.5.2 REQ-SU-01: Secure update provided by operational environment . 43
5.5.2.1 Requirement . 43
5.5.2.2 Applicability. 43
5.5.3 Mapping of requirements to use cases . 44
5.6 Authentication and access control . 44
5.6.1 Overview . 44
5.6.2 REQ-AAC-01: Authentication and access control provided by operational environment. 44
5.6.2.1 Requirement . 44
5.6.2.2 Applicability. 44
5.6.3 Mapping of requirements to use cases . 45
5.7 Confidentiality protection . 46
5.7.1 Overview . 46
5.7.2 REQ-CP-01: Confidentiality protection provided by operational environment . 46
5.7.2.1 Requirement . 46
5.7.2.2 Applicability. 46
5.7.2.3 Guidance . 47
5.7.3 Mapping of requirements to use cases . 47
5.8 Integrity protection . 47
5.8.1 Overview . 47
5.8.2 REQ-IP-01: Integrity protection provided by operational environment . 47
5.8.2.1 Requirement . 47
5.8.2.2 Applicability. 47
5.8.3 Mapping of requirements to use cases . 48
ETSI
5 Draft ETSI EN 304 625 V1.0.0 (2026-08)
5.9 Data minimisation . 49
5.9.1 Overview . 49
5.9.2 REQ-DM-01: Data minimisation . 49
5.9.2.1 Requirement . 49
5.9.2.2 Applicability. 49
5.9.3 Mapping of requirements to use cases . 50
5.10 Availability protection . 50
5.10.1 Overview . 50
5.10.2 REQ-AP-01 Fast packet drop . 50
5.10.2.1 Requirement . 50
5.10.2.2 Applicability. 50
5.10.2.3 Guidance . 51
5.10.3 REQ-AP-02 Limit resource usage by incoming network data . 51
5.10.3.1 Requirement . 51
5.10.3.2 Applicability. 51
5.10.4 REQ-AP-03 Availability protection provided by operational environment . 52
5.10.4.1 Requirement . 52
5.10.4.2 Applicability. 52
5.10.5 REQ-AP-04: Watchdog and notification of host . 53
5.10.5.1 Requirement . 53
5.10.5.2 Applicability. 53
5.10.6 REQ-AP-05: Watchdog and self-initiated reset . 54
5.10.6.1 Requirement . 54
5.10.6.2 Applicability. 54
5.10.7 Mapping of requirements to use cases . 55
5.11 Non-interference . 55
5.11.1 Overview . 55
5.11.2 REQ-NI-01: Minimise data transmitted to unverified sources . 55
5.11.2.1 Requirement . 55
5.11.2.2 Applicability. 55
5.11.2.3 Guidance . 56
5.11.3 Mapping of requirements to use cases . 57
5.12 Attack surface minimisation . 57
5.12.1 Overview . 57
5.12.2 REQ-ASM-01: Minimise attack surface . 57
5.12.2.1 Requirement . 57
5.12.2.2 Applicability. 57
5.12.3 Mapping of requirements to use cases . 58
5.13 Exploit mitigation . 58
5.13.1 Overview . 58
5.13.2 Requirements . 58
5.13.3 Mapping of requirements to use cases . 59
5.14 Monitoring . 59
5.14.1 Overview . 59
5.14.2 REQ-MON-01: Logging . 59
5.14.2.1 Requirement . 59
5.14.2.2 Applicability. 59
5.14.3 Mapping of requirements to use cases . 60
5.15 Factory reset and data portability . 60
5.15.1 Overview . 60
5.15.2 REQ-SDT-01 Secure deletion. 61
5.15.2.1 Requirement . 61
5.15.2.2 Applicability. 61
5.15.3 REQ-SDT-02 Secure data read provided by operational environment . 62
5.15.3.1 Requirement . 62
5.15.3.2 Applicability. 62
5.15.4 Mapping of requirements to use cases . 63
6 Assessment criteria for compliance with technical requirements . 63
6.1 Introduction to the assessment and compliance criteria . 63
6.1.1 General . 63
6.1.2 Guidance for identifying interfaces or data processing . 65
ETSI
6 Draft ETSI EN 304 625 V1.0.0 (2026-08)
6.2 Appropriate level of cybersecurity . 65
6.2.1 Overview . 65
6.2.2 REQ-ALC-01 Resilience to potentially untrusted inputs . 65
6.2.2.1 Objective . 65
6.2.2.2 Preparation . 66
6.2.2.3 Activities . 67
6.2.2.4 Verdict . 67
6.2.2.5 Evidence . 67
6.2.2.6 Guidance . 67
6.3 No known exploitable vulnerabilities . 68
6.3.1 Overview . 68
6.3.2 REQ-KEV-01 No known exploitable vulnerabilities . 68
6.3.2.1 Objective . 68
6.3.2.2 Preparation . 68
6.3.2.3 Activities . 68
6.3.2.4 Verdict . 68
6.3.2.5 Evidence . 68
6.3.2.6 Guidance . 69
6.4 Secure by default configuration . 69
6.4.1 Overview . 69
6.4.2 REQ-SBD-01: Provide methods to protect or disable interfaces . 69
6.4.2.1 Objective . 69
6.4.2.2 Preparation . 69
6.4.2.3 Activities . 69
6.4.2.4 Verdict . 69
6.4.2.5 Evidence . 70
6.4.2.6 Guidance . 70
6.4.3 REQ-SBD-02: Protect or disable access to debug or management interfaces . 70
6.4.3.1 Objective . 70
6.4.3.2 Preparation . 70
6.4.3.3 Activities . 70
6.4.3.4 Verdict . 70
6.4.3.5 Evidence . 71
6.5 Security updates . 71
6.5.1 Overview . 71
6.5.2 REQ-SU-01 Secure update provided by operational environment . 71
6.5.2.1 Objective . 71
6.5.2.2 Preparation . 71
6.5.2.3 Activities . 71
6.5.2.4 Verdict . 71
6.5.2.5 Evidence . 71
6.5.2.6 Guidance . 72
6.6 Authentication and access control . 72
6.6.1 Overview . 72
6.6.2 REQ-AAC-01: Authentication and access control provided by operational environment. 72
6.6.2.1 Objective . 72
6.6.2.2 Preparation . 72
6.6.2.3 Activities . 72
6.6.2.4 Verdict . 72
6.6.2.5 Evidence . 72
6.7 Confidentiality protection . 72
6.7.1 Overview . 72
6.7.2 REQ-CP-01: Confidentiality protection provided by operational environment . 73
6.7.2.1 Objective . 73
6.7.2.2 Preparation . 73
6.7.2.3 Activities . 73
6.7.2.4 Verdict . 73
6.7.2.5 Evidence . 73
6.7.2.6 Guidance . 73
6.8 Integrity protection . 74
6.8.1 Overview . 74
6.8.2 REQ-IP-01: Integrity protection provided by operational environment . 74
ETSI
7 Draft ETSI EN 304 625 V1.0.0 (2026-08)
6.8.2.1 Objective . 74
6.8.2.2 Preparation . 74
6.8.2.3 Activities . 74
6.8.2.4 Verdict . 74
6.8.2.5 Evidence . 74
6.8.2.6 Guidance . 74
6.9 Data minimisation . 75
6.9.1 Overview . 75
6.9.2 REQ-DM-01: Minimise data processed . 75
6.9.2.1 Objective . 75
6.9.2.2 Preparation . 75
6.9.2.3 Activities . 75
6.9.2.4 Verdict . 75
6.9.2.5 Evidence .
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