oSIST prEN 304 631 V1.0.0:2026

SLOVENSKI STANDARD
01-september-2026
Kibernetska varnost (CYBER) - CRA - Zahteve za kibernetsko varnost za virtualne
pomočnike splošnega namena v pametnih domovih
Cyber Security (CYBER) - CRA - Cybersecurity requirements for smart home general
purpose virtual assistants
Ta slovenski standard je istoveten z: ETSI EN 304 631 V1.0.0 (2026-07)
ICS:
35.030 Informacijska varnost IT Security
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Draft ETSI EN 304 631 V1.0.0 (2026-07)

HARMONISED EUROPEAN STANDARD
Cyber Security (CYBER);
CRA;
Cybersecurity requirements for
smart home general purpose virtual assistants

2 Draft ETSI EN 304 631 V1.0.0 (2026-07)

Reference
DEN/CYBER-EUS-0011
Keywords
CRA, cybersecurity, intelligent homes & buildings

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© ETSI 2026.
All rights reserved.
ETSI
3 Draft ETSI EN 304 631 V1.0.0 (2026-07)
Contents
Intellectual Property Rights . 10
Foreword. 10
Modal verbs terminology . 11
Introduction . 11
1 Scope . 12
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 12
3 Definition of terms, symbols and abbreviations . 13
3.1 Terms . 13
3.1.1 Architecture related terms . 13
3.1.2 Asset categories . 14
3.1.3 Communication types . 14
3.1.4 Data assets . 15
3.1.5 Data related terms . 16
3.1.6 Function assets . 17
3.1.7 Function related terms . 18
3.1.8 Interface . 22
3.1.9 Operational environments . 23
3.1.10 Users. 23
3.2 Symbols . 23
3.3 Abbreviations . 24
4 Product context . 26
4.1 Product functions . 26
4.1.1 Function assets . 26
4.1.2 Data assets . 26
4.2 Product architecture . 27
4.3 Operational environment . 28
4.3.1 General description . 28
4.3.2 Physical/Hardware environment . 28
4.3.3 Logical/Software environment . 29
4.3.4 Connectivity aspects . 29
4.4 Distribution of security functions . 29
4.5 Users . 30
4.6 Use cases . 30
5 Technical requirements for products . 30
5.1 Introduction - Applicability of the requirements . 30
5.2 Appropriate level of cybersecurity . 30
5.2.0 Introduction on appropriate level of cybersecurity requirements . 30
5.2.1 [USERNOT-NOSECFUC] User notifications on not available security functions . 30
5.2.2 [USERNOT-SECREL] Language and representation for security-related user notifications . 30
5.2.3 [GUI-SECCONF] Visual representation of security-related configuration via GUIs . 31
5.2.4 [BACKUP-TRANS] Data transfer mechanisms for loss sensitive data . 31
5.2.5 [BACKUP-AUTOTRANS] Automatic data transfer mechanisms for loss sensitive data . 31
5.2.6 [BACKUP-EXPORT] Data export mechanisms for loss sensitive data . 31
5.3 No known exploitable vulnerabilities . 31
5.3.0 Introduction on no known exploitable vulnerabilities . 31
5.3.1 [NKEV-MKAV] No known exploitable vulnerabilities . 31
5.3.2 [NKEV-INIT-UDP] Initial security update before or during first use . 31
5.4 Secure by default configuration . 32
5.4.0 Introduction on secure by default configuration. 32
5.4.1 [SDC-AUM-FH] Default configuration of authentication for functions whose use can cause harm . 32
5.4.2 [SDC-SUM-AUTO] Default configuration of automated security updates . 32
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5.4.3 [SDC-SUM-NOTIF] Default configuration of update notifications . 32
5.4.4 [SDC-FRM] Factory reset to restore the default state . 32
5.4.5 [SDC-MON-HANDLE] Handling of events by default . 33
5.4.6 [CRY-GENERAL] General requirements related to cryptography . 33
5.4.7 [CRY-CCK-PRE-LEN] Key size of preinstalled long term confidential cryptographic keys . 33
5.4.8 [CRY-CCK-GEN] Default key size of generated long term confidential cryptographic keys . 33
5.4.9 [CRY-PW-PRE-COM] Complexity of preinstalled passwords . 33
5.4.10 [CRY-PW-GEN-COM] Default complexity of generated passwords . 33
5.4.11 [CRY-PW-USR-COM] Recommended complexity of user chosen passwords . 34
5.5 Security updates . 34
5.5.0 Introduction on security updates . 34
5.5.1 [SU-SUPPORT] Secure software update mechanism . 34
5.5.2 [SU-PROVIDE] Secure software update mechanism for core components . 34
5.5.3 [SU-AUTO] Automated security updates . 34
5.5.4 [SU-DISABLE-AUTO] Option to disable automated security updates . 35
5.5.5 [SU-POSTPONE-AUTO] Option to postpone automated security updates. 35
5.5.6 [SU-NOTIF] Update notifications . 35
5.6 Authentication and access control . 35
5.6.0 Introduction on authentication and access control . 35
5.6.1 [ACM-FH] Access control for functions whose use can cause harm . 35
5.6.2 [AUM-FH] Authentication for functions whose use can cause harm . 36
5.6.3 [AUTHZ-LP] Least privilege in authorisation policies . 37
5.6.4 [AUTHZ-R] Revocability of granted permissions . 37
5.7 Confidentiality protection . 37
5.7.0 Introduction on confidentiality protection . 37
5.7.1 [CONF-SSM] Confidentiality protecting persistent storage for confidential data . 37
5.7.2 [CONF-COM] Communication of confidential data . 37
5.7.3 [CONF-MON-HW] Indication of active capture of audio or video data for hardware architectural
component SHGPVA . 38
5.7.4 [CONF-MON-UI] Indication of active capture of audio or video data for software architectural
component SHGPVA with human interfaces . 38
5.7.5 [CONF-MON-API] Indication of active capture of audio or video data for software architectural
component SHGPVA without a human interface. 39
5.7.6 [CONF-CAPT-MUTE] Mechanism to disable capture . 39
5.7.7 [CONF-CAPT-MUTE-DISABLE] Allowing capturing after disabling . 39
5.8 Integrity protection . 39
5.8.0 Introduction on integrity protection . 39
5.8.1 [INT-SSM] Integrity protecting persistent storage for integrity relevant data . 39
5.8.2 [INT-COM] Communication of integrity relevant data . 40
5.8.3 [INT-SWPCK] Software package verification . 41
5.9 Data minimisation . 41
5.9.0 Introduction on data minimisation . 41
5.9.1 [DMIN-DJST] Minimise processed data. 41
5.9.2 [DMIN-USERINFO] User Information about processing of audio- and video data . 41
5.9.3 [DMIN-LOCAL] Local event detection . 42
5.10 Availability protection . 42
5.10.0 Introduction on availability protection . 42
5.10.1 [AVAI-TIME-RECO-POW] Restoration after loss of power . 42
5.10.2 [AVAI-TIME-NETW] Local operation . 42
5.10.3 [AVAI-TIME-RECO-NETW] Restoration after loss of network connection . 42
5.10.4 [AVAI-TIME-OUTA-NOT] Notify non-availability . 42
5.10.5 [AVAI-TIME-PREV-NOT] Notify upcoming limitation . 43
5.10.6 [AVAI-TIME-NET-PRIO] Network prioritisation . 43
5.10.7 [AVAI-TIME-RES-PRIO] Power resource prioritization . 43
5.10.8 [AVAI-TIME-DOS-RATE] Incoming rate limiting . 43
5.10.9 [AVAI-SUM-SCHEDULE] Scheduling of updates . 43
5.11 Non-interference . 43
5.11.0 Introduction on non-interference . 43
5.11.1 [NOINF-AMP] Amplification control . 44
5.12 Attack surface minimisation . 44
5.12.0 Introduction on attack surface minimisation . 44
5.12.1 [LAS-INVAL] Validation of external data input . 44
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5.12.2 [LAS-INSAN] Sanitisation of external data input . 44
5.12.3 [LAS-PHY-INF] Only necessary physical interfaces . 44
5.12.4 [LAS-LOGIC-INF] Only necessary logical interfaces active by default . 44
5.12.5 [LAS-APP] Only necessary apps by default . 44
5.12.6 [LAS-SBOOT] Secure boot . 45
5.13 Exploit mitigation . 45
5.13.0 Introduction on exploit mitigation . 45
5.13.1 [PRIV-DATA-HIGH] Privileged access on impact class high data assets . 45
5.13.2 [PRIV-FUNC-HIGH] Privileged access on impact class high function assets . 45
5.14 Monitoring . 45
5.14.0 Introduction on monitoring . 45
5.14.1 [MON-LOW] Events to log for low risk SHGPVA . 46
5.14.2 [MON-MEDIUM] Events to log for medium risk SHGPVA . 46
5.14.3 [MON-HIGH] Events to log for high risk SHGPVA . 46
5.14.4 [MON-HANDLE] Handling of events . 47
5.14.5 [LOG-TIME] Timestamps for logs . 47
5.14.6 [LOG-TIME-HIGH] Real-time timestamps for logs . 47
5.14.7 [LOG-STORE-MEDIUM] Logfile persistence for medium risk SHGPVA . 47
5.14.8 [LOG-STORE-HIGH] Logfile persistence for high risk SHGPVA . 47
5.14.9 [LOG-CONFIG] Configuration of logging mechanisms . 48
5.14.10 [LOG-USER-ACC] User access to logs concerning their privacy . 48
5.15 Factory reset and data portability . 48
5.15.0 Introduction on factory reset and data portability . 48
5.15.1 [DLM-PERM] Permanent removal of user-related data . 48
6 Assessment criteria for compliance with technical requirements . 49
6.1 General . 49
6.2 Appropriate level of cybersecurity . 50
6.2.1 Assessment criteria for [USERNOT-NOSECFUC] . 50
6.2.2 Assessment criteria for [USERNOT-SECREL] . 51
6.2.3 Assessment criteria for [GUI-SECCONF] . 52
6.2.4 Assessment criteria for [BACKUP-TRANS] . 53
6.2.5 Assessment criteria for [BACKUP-AUTOTRANS] . 54
6.2.6 Assessment criteria for [BACKUP-EXPORT]. 56
6.3 No known exploitable vulnerabilities . 57
6.3.1 Assessment criteria for [NKEV-MKAV] . 57
6.3.2 Assessment criteria for [NKEV-INIT-UDP] . 58
6.4 Secure by default configuration . 59
6.4.1 Assessment criteria for [SDC-AUM-FH] . 59
6.4.2 Assessment criteria for [SDC-SUM-AUTO] . 60
6.4.3 Assessment criteria for [SDC-SUM-NOTIF] . 62
6.4.4 Assessment criteria for [SDC-FRM] . 63
6.4.5 Assessment criteria for [SDC-MON-HANDLE] . 64
6.4.6 Assessment criteria for [CRY-GENERAL] . 65
6.4.7 Assessment criteria for [CRY-CCK-PRE-LEN] . 65
6.4.8 Assessment criteria for [CRY-CCK-GEN] . 66
6.4.9 Assessment criteria for [CRY-PW-PRE-COM] . 67
6.4.10 Assessment criteria for [CRY-PW-GEN-COM] . 67
6.4.11 Assessment criteria for [CRY-PW-USR-COM]. 68
6.5 Security updates . 70
6.5.1 Assessment criteria for [SU-SUPPORT]. 70
6.5.2 Assessment criteria for [SU-PROVIDE] . 71
6.5.3 Assessment criteria for [SU-AUTO] . 72
6.5.4 Assessment criteria for [SU-DISABLE-AUTO] . 73
6.5.5 Assessment criteria for [SU-POSTPONE-AUTO]. 74
6.5.6 Assessment criteria for [SU-NOTIF] . 75
6.6 Authentication and access control . 77
6.6.1 Assessment criteria for [ACM-FH] . 77
6.6.2 Assessment criteria for [AUM-FH] . 78
6.6.3 Assessment criteria for [AUTHZ-LP] . 79
6.6.4 Assessment criteria for [AUTHZ-R] . 80
6.7 Confidentiality protection . 81
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6.7.1 Assessment criteria for [CONF-SSM] . 81
6.7.2 Assessment criteria for [CONF-COM] . 82
6.7.3 Assessment criteria for [CONF-MON-HW] . 83
6.7.4 Assessment criteria for [CONF-MON-UI] . 84
6.7.5 Assessment criteria for [CONF-MON-API] . 85
6.7.6 Assessment criteria for [CONF-CAPT-MUTE] . 87
6.7.7 Assessment criteria for [CONF-CAPT-MUTE-DISABLE] . 88
6.8 Integrity protection . 89
6.8.1 Assessment criteria for [INT-SSM] . 89
6.8.2 Assessment criteria for [INT-COM] . 90
6.8.3 Assessment criteria for [INT-SWPCK] . 91
6.9 Data minimisation . 93
6.9.1 Assessment criteria for [DMIN-DJST] . 93
6.9.2 Assessment criteria for [DMIN-USERINFO] . 93
6.9.3 Assessment criteria for [DMIN-LOCAL] . 94
6.10 Availability protection . 96
6.10.1 Assessment criteria for [AVAI-TIME-RECO-POW] . 96
6.10.2 Assessment criteria for [AVAI-TIME-NETW] . 97
6.10.3 Assessment criteria for [AVAI-TIME-RECO-NETW] . 99
6.10.4 Assessment criteria for [AVAI-TIME-OUTA-NOT] . 100
6.10.5 Assessment criteria for [AVAI-TIME-PREV-NOT] . 102
6.10.6 Assessment criteria for [AVAI-TIME-NET-PRIO] . 103
6.10.7 Assessment criteria for [AVAI-TIME-RES-PRIO] . 104
6.10.8 Assessment criteria for [AVAI-TIME-DOS-RATE] . 106
6.10.9 Assessment criteria for [AVAI-SUM-SCHEDULE] . 107
6.11 Non-interference . 108
6.11.1 Assessment criteria for [NOINF-AMP] . 108
6.12 Attack surface minimisation . 109
6.12.1 Assessment criteria for [LAS-INVAL] . 109
6.12.2 Assessment criteria for [LAS-INSAN] . 110
6.12.3 Assessment criteria for [LAS-PHY-INF] . 111
6.12.4 Assessment criteria for [LAS-LOGIC-INF] . 112
6.12.5 Assessment criteria for [LAS-APP] . 113
6.12.6 Assessment criteria for [LAS-SBOOT]. 114
6.13 Exploit mitigation . 115
6.13.1 Assessment criteria for [PRIV-DATA-HIGH] . 115
6.13.2 Assessment criteria for [PRIV-FUNC-HIGH] . 116
6.14 Monitoring . 117
6.14.1 Assessment criteria for [MON-LOW] . 117
6.14.2 Assessment criteria for [MON-MEDIUM] . 118
6.14.3 Assessment criteria for [MON-HIGH] . 119
6.14.4 Assessment criteria for [MON-HANDLE] . 120
6.14.5 Assessment criteria for [LOG-TIME] . 121
6.14.6 Assessment criteria for [LOG-TIME-HIGH] . 122
6.14.7 Assessment criteria for [LOG-STORE-MEDIUM] . 123
6.14.8 Assessment criteria for [LOG-STORE-HIGH] . 124
6.14.9 Assessment criteria for [LOG-CONFIG] . 125
6.14.10 Assessment criteria for [LOG-USER-ACC] . 126
6.15 Factory reset and data portability . 127
6.15.1 Assessment criteria for [DLM-PERM] . 127
Annex A (informative): Relationship between the present document and the essential
cybersecurity requirements of EU Regulation (EU) 2024/2847 . 130
Annex B (informative): Security analysis. 135
B.1 General . 135
B.2 Assets . 135
B.3 Risk factors . 135
B.4 Assumptions . 135
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B.5 Threats . 136
B.6 Relationship between the present document and the covered/not covered cybersecurity risks . 137
B.7 Guidance for determining impact classes . 141
B.7.1 General . 141
B.7.2 Confidential data . 141
B.7.3 Loss sensitive data . 141
B.7.4 Time sensitive function . 142
B.7.5 Integrity relevant data and integrity relevant function . 142
Annex C: Void . 144
Annex D (normative): Relationship between specific data and functions assets covered by
the present document to impact classes for generic asset categories . 145
D.1 Data assets . 145
D.2 Function assets . 146
Annex E (normative): Protection measures . 148
E.1 Authentication mechanism strength . 148
E.1.1 [AUM-FH] Authentication for functions whose use can cause harm . 148
E.1.1.1 General . 148
E.1.1.2 [AUM-E-I-Basic] AUTH.Basic inherence based SFA . 148
E.1.1.3 [AUM-E-K-Basic] AUTH.Basic knowledge based SFA . 148
E.1.1.4 [AUM-E-I-Normal] AUTH.Normal inherence based SFA . 148
E.1.1.5 [AUM-E-K-Normal] AUTH.Normal knowledge based SFA . 148
E.1.1.6 [AUM-E-P-Normal] AUTH.Normal possession based SFA . 148
E.1.1.7 [AUM-E-MFA-Normal] AUTH.Normal MFA . 149
E.1.1.8 [AUM-E-I-Enhanced] AUTH.Enhanced inherence based SFA . 149
E.1.1.9 [AUM-E-K-Enhanced] AUTH.Enhanced knowledge based SFA . 149
E.1.1.10 [AUM-E-P-Enhanced] AUTH.Enhanced possession based SFA . 149
E.1.1.11 [AUM-E-MFA-Enhanced] AUTH.Enhanced MFA . 149
E.1.1.12 [AUM-E-I-Strong] AUTH.Strong inherence based SFA . 150
E.1.1.13 [AUM-E-P-Strong] AUTH.Strong possession based SFA . 150
E.1.1.14 [AUM-E-MFA-Strong] AUTH.Strong MFA . 150
E.1.1.15 [AUM-E-Replay] AUTH.Normal, AUTH.Enhanced and AUTH.Strong replay protection . 150
E.1.1.16 [AUM-E-PitM] AUTH.Normal, AUTH.Enhanced and AUTH.Strong person in the middle
protection . 151
E.1.2 Assessment for [AUM-FH] authentication mechanism strength . 151
E.1.2.1 General . 151
E.1.2.2 Assessment criteria for [AUM-E-I-Basic] . 151
E.1.2.3 Assessment criteria for [AUM-E-K-Basic] . 152
E.1.2.4 Assessment criteria for [AUM-E-I-Normal] . 153
E.1.2.5 Assessment criteria for [AUM-E-K-Normal] . 154
E.1.2.6 Assessment criteria for [AUM-E-P-Normal] . 154
E.1.2.7 Assessment criteria for [AUM-E-MFA-Normal] . 156
E.1.2.8 Assessment criteria for [AUM-E-I-Enhanced] . 157
E.1.2.9 Assessment criteria for [AUM-E-K-Enha
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