ETSI EN 300 392-7 V3.2.1 (2010-06)
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 7: Security
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 7: Security
REN/TETRA-06179
Prizemni snopovni radio (TETRA) - Govor in podatki (V+D) - 7. del: Varnost
Pričujoči dokument določa prizemni snopovni radijski (TETRA) sistem, ki podpira govor in podatke (V+D). Določa radijski vmesnik, medsebojno delovanje med TETRA sistemi in drugimi sistemi skozi prehodnike, vmesnik terminalne opreme na mobilni postaji, povezavo linijskih postaj na infrastrukturo, varnostne vidike v TETRA omrežjih, storitve upravljanja, ponujene operaterju, cilje delovanja in dopolnilne storitve, ki so dodane osnovnim in tele-storitvami. Pričujoči del opisuje varnostne mehanizme v TETRA V+D. Zagotavlja mehanizme za zaupnost kontrolnih signalov ter uporabnikovega govora in podatkov pri radijskem vmesniku, avtentikacijo in mehanizme za upravljanje ključev za radijski vmesnik in za medsistemski vmesnik (ISI). Klavzula 4 opisuje avtentikacijo in mehanizme za upravljanje ključev za TETRA radijski vmesnik. Naslednji dve avtentikacijski storitvi so bile v ETR 086-3 [i.3] določene za radijski vmesnik glede na analizo tveganja:
- avtentikacija MS z TETRA infrastrukturo;
- avtentikacija TETRA infrastrukture z MS.
Klavzula 5 opisuje mehanizme in protokol za omogočanje in onemogočanje obeh, tako opreme mobilnih postaj kot tudi uporabniških naročnin mobilnih postaj. Enkripcija radijskega vmesnika je lahko zagotovljena kot možnost v TETRA.
Kjer uporabljena Klavzula 6 opisuje mehanizme zaupnosti z uporabo enkripcije radijskega vmesnika za govor v krožnem načinu, podatke v krožnem načinu, podatkovne pakete in kontrolne informacije.
Klavzula 6 opisuje enkripcijske mehanizme in postopke mobilnosti. Prav tako podrobno opisuje protokol v zvezi z kontrolo enkripcije v radijskem vmesniku. Pričujoči dokument ne naslavlja podrobnosti o ravnanju z napakami protokola ali vseh mehanizmov protokola, kadar TETRA deluje v načetem načinu. Ta vprašanja so določena z izvedbo in potemtakem sodijo zunaj področja uporabe prizadevanj za standardizacijo TETRA. Podroben opis avtentikacijskega centra je zunaj področja uporabe pričujočega dokumenta.
General Information
Buy Standard
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prizemni snopovni radio (TETRA) - Govor in podatki (V+D) - 7. del: VarnostTerrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 7: Security33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 392-7 Version 3.2.1SIST EN 300 392-7 V3.2.1:2010en01-oktober-2010SIST EN 300 392-7 V3.2.1:2010SLOVENSKI
STANDARD
SIST EN 300 392-7 V3.2.1:2010
ETSI EN 300 392-7 V3.2.1 (2010-06)European Standard (Telecommunications series) Terrestrial Trunked Radio (TETRA);Voice plus Data (V+D);Part 7: Security SIST EN 300 392-7 V3.2.1:2010
ETSI ETSI EN 300 392-7 V3.2.1 (2010-06) 2
Reference REN/TETRA-06179 Keywords security, TETRA, V+D ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2010. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE™ is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 300 392-7 V3.2.1:2010
ETSI ETSI EN 300 392-7 V3.2.1 (2010-06) 3 Contents Intellectual Property Rights . 10 Foreword . 10 1 Scope . 12 2 References . 12 2.1 Normative references . 12 2.2 Informative references . 13 3 Definitions and abbreviations . 13 3.1 Definitions . 13 3.2 Abbreviations . 16 4 Air Interface authentication and key management mechanisms . 18 4.0 Security classes . 18 4.1 Air interface authentication mechanisms . 19 4.1.1 Overview . 19 4.1.2 Authentication of an MS . 19 4.1.3 Authentication of the infrastructure . 20 4.1.4 Mutual authentication of MS and infrastructure . 21 4.1.5 The authentication key . 23 4.1.6 Equipment authentication . 23 4.1.7 Authentication of an MS when migrated . 24 4.1.8 Authentication of the home SwMI when migrated . 24 4.1.9 Mutual Authentication of MS and infrastructure when migrated . 25 4.2 Air Interface key management mechanisms . 26 4.2.1 The DCK . 26 4.2.2 The GCK . 27 4.2.2.1 Session key modifier GCK0 . 28 4.2.3 The CCK . 28 4.2.4 The SCK . 29 4.2.4.1 SCK association for DMO use . 31 4.2.4.1.1 DMO SCK subset grouping . 31 4.2.5 The GSKO . 34 4.2.5.1 SCK distribution to groups with OTAR . 35 4.2.5.2 GCK distribution to groups with OTAR . 35 4.2.5.3 Rules for MS response to group key distribution . 36 4.2.6 Encrypted Short Identity (ESI) mechanism . 36 4.2.7 Encryption Cipher Key . 37 4.2.8 Summary of AI key management mechanisms . 37 4.3 Service description and primitives . 39 4.3.1 Authentication primitives . 39 4.3.2 SCK transfer primitives . 39 4.3.3 GCK transfer primitives . 40 4.3.4 GSKO transfer primitives . 41 4.4 Authentication protocol . 42 4.4.1 Authentication state transitions . 42 4.4.2 Authentication protocol sequences and operations . 45 4.4.2.1 MSCs for authentication . 46 4.4.2.2 MSCs for authentication Type-3 element . 52 4.4.2.3 Control of authentication timer T354 at MS . 55 4.5 OTAR protocols . 56 4.5.1 CCK delivery - protocol functions . 56 4.5.1.1 SwMI-initiated CCK provision . 56 4.5.1.2 MS-initiated CCK provision with U-OTAR CCK demand. 58 4.5.1.3 MS-initiated CCK provision with announced cell reselection . 59 4.5.2 OTAR protocol functions - SCK . 59 4.5.2.1 MS requests provision of SCK(s) . 60 4.5.2.2 SwMI provides SCK(s) to individual MS . 61 SIST EN 300 392-7 V3.2.1:2010
ETSI ETSI EN 300 392-7 V3.2.1 (2010-06) 4 4.5.2.3 SwMI provides SCK(s) to group of MSs . 64 4.5.2.4 SwMI rejects provision of SCK . 66 4.5.3 OTAR protocol functions - GCK . 66 4.5.3.1 MS requests provision of GCK . 66 4.5.3.2 SwMI provides GCK to an individual MS . 69 4.5.3.3 SwMI provides GCK to a group of MSs . 71 4.5.3.4 SwMI rejects provision of GCK . 73 4.5.4 Cipher key association to group address . 73 4.5.4.1 SCK association for DMO . 74 4.5.4.2 GCK association . 78 4.5.5 Notification of key change over the air . 80 4.5.5.1 Change of DCK . 82 4.5.5.2 Change of CCK . 82 4.5.5.3 Change of GCK . 82 4.5.5.4 Change of SCK for TMO . 82 4.5.5.5 Change of SCK for DMO . 83 4.5.5.6 Synchronization of Cipher Key Change . 83 4.5.6 Security class change . 83 4.5.6.1 Change of security class to security class 1 . 84 4.5.6.2 Change of security class to security class 2 . 84 4.5.6.3 Change of security class to security class 3 . 84 4.5.6.4 Change of security class to security class 3 with GCK . 85 4.5.7 Notification of key in use . 85 4.5.8 Notification of GCK Activation/Deactivation . 85 4.5.9 Deletion of SCK, GCK and GSKO . 85 4.5.10 Air Interface Key Status Enquiry . 87 4.5.11 Crypto management group . 90 4.5.12 OTAR retry mechanism . 90 4.5.13 OTAR protocol functions - GSKO . 91 4.5.13.1 MS requests provision of GSKO . 91 4.5.13.2 SwMI provides GSKO to an MS . 92 4.5.13.3 SwMI rejects provision of GSKO . 93 4.5.14 OTAR protocol functions - interaction and queuing . 93 4.5.15 KSOv for OTAR operations in visited SwMI . 93 4.5.16 Transfer of AI cipher keys across the ISI . 97 5 Enable and disable mechanism . 97 5.1 General relationships . 98 5.2 Enable/disable state transitions . 98 5.3 Mechanisms . 99 5.3.1 Disable of MS equipment . 100 5.3.2 Disable of an subscription . 100 5.3.3 Disable of subscription and equipment . 100 5.3.4 Enable an MS equipment . 100 5.3.5 Enable an MS subscription . 100 5.3.6 Enable an MS equipment and subscription . 100 5.4 Enable/disable protocol . 101 5.4.1 General case . 101 5.4.2 Status of cipher key material. 102 5.4.2.1 Permanently disabled state . 102 5.4.2.2 Temporarily disabled state . 102 5.4.3 Specific protocol exchanges . 103 5.4.3.1 Disabling an MS with mutual authentication . 103 5.4.3.2 Enabling an MS with mutual authentication . 105 5.4.3.3 Enabling an MS with non-mutual authentication . 106 5.4.3.4 Disabling an MS with non-mutual authentication . 107 5.4.4 Enabling an MS without authentication . 108 5.4.5 Disabling an MS without authentication . 109 5.4.6 Rejection of enable or disable command . 109 5.4.6a Expiry of Enable/Disable protocol timer . 110 5.4.7 MM service primitives . 111 5.4.7.1 TNMM-DISABLING primitive . 111 SIST EN 300 392-7 V3.2.1:2010
ETSI ETSI EN 300 392-7 V3.2.1 (2010-06) 5 5.4.7.2 TNMM-ENABLING primitive . 111 6 Air Interface (AI) encryption . 111 6.1 General principles. 111 6.2 Security class . 112 6.2.0 Notification of security class . 113 6.2.0.1 Security Class of Neighbouring Cells . 113 6.2.0.2 Identification of MS security capabilities . 113 6.2.1 Constraints on LA arising from cell class . 114 6.3 Key Stream Generator (KSG) . 114 6.3.1 KSG numbering and selection . 114 6.3.2 Interface parameters . 115 6.3.2.1 Initial Value (IV) . 115 6.3.2.2 Cipher Key . 115 6.4 Encryption mechanism . 116 6.4.1 Allocation of KSS to logical channels . 116 6.4.2 Allocation of KSS to logical channels with PDU association . 118 6.4.2.1 General . 118 6.4.2.2 KSS allocation on phase modulation channels . 118 6.4.2.3 KSS allocation on QAM channels . 120 6.4.2.3.1 Fixed mapping . 120 6.4.2.3.2 Offset mapping . 121 6.4.3 Synchronization of data calls where data is multi-slot interleaved . 122 6.4.4 Recovery of stolen frames from interleaved data . 123 6.5 Use of cipher keys . 123 6.5.1 Identification of encryption state of downlink MAC PDUs . 124 6.5.1.1 Class 1 cells . 124 6.5.1.2 Class 2 cells . 125 6.5.1.3 Class 3 cells . 125 6.5.2 Identification of encryption state of uplink MAC PDUs . 125 6.6 Mobility procedures . 126 6.6.1 General requirements . 126 6.6.1.1 Additional requirements for class 3 systems . 126 6.6.2 Protocol description . 126 6.6.2.1 Negotiation of ciphering parameters . 126 6.6.2.1.1 Class 1 cells . 126 6.6.2.1.2 Class 2 cells . 127 6.6.2.1.3 Class 3 cells . 127 6.6.2.2 Initial and undeclared cell re-selection . 127 6.6.2.3 Unannounced cell re-selection . 128 6.6.2.4 Announced cell re-selection type-3 . 129 6.6.2.5 Announced cell re-selection type-2 . 129 6.6.2.6 Announced cell re-selection type-1 . 129 6.6.2.7 Key forwarding . 129 6.7 Encryption control . 131 6.7.1 Data to be encrypted . 131 6.7.1.1 Downlink control channel requirements . 131 6.7.1.2 Encryption of MAC header elements . 131 6.7.1.3 Traffic channel encryption control . 131 6.7.1.4 Handling of PDUs that do not conform to negotiated ciphering mode . 132 6.7.2 Service description and primitives . 132 6.7.2.1 Mobility Management (MM) . 133 6.7.2.2 Mobile Link Entity (MLE) . 133 6.7.2.3 Layer 2 . 135 6.7.3 Protocol functions . 135 6.7.3.1 MM . 135 6.7.3.2 MLE . 135 6.7.3.3 LLC . 135 6.7.3.4 MAC . 136 6.7.4 PDUs for cipher negotiation . 136 Annex A (normative): PDU and element definitions . 137 SIST EN 300 392-7 V3.2.1:2010
ETSI ETSI EN 300 392-7 V3.2.1 (2010-06) 6 A.1 Authentication PDUs .
...
ETSI EN 300 392-7 V3.2.1 (2010-06)
European Standard (Telecommunications series)
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 7: Security
---------------------- Page: 1 ----------------------
2 ETSI EN 300 392-7 V3.2.1 (2010-06)
Reference
REN/TETRA-06179
Keywords
security, TETRA, V+D
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI EN 300 392-7 V3.2.1 (2010-06)
Contents
Intellectual Property Rights . 10
Foreword . 10
1 Scope . 12
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 13
3 Definitions and abbreviations . 13
3.1 Definitions . 13
3.2 Abbreviations . 16
4 Air Interface authentication and key management mechanisms . 18
4.0 Security classes . 18
4.1 Air interface authentication mechanisms . 19
4.1.1 Overview . 19
4.1.2 Authentication of an MS . 19
4.1.3 Authentication of the infrastructure . 20
4.1.4 Mutual authentication of MS and infrastructure . 21
4.1.5 The authentication key . 23
4.1.6 Equipment authentication . 23
4.1.7 Authentication of an MS when migrated . 24
4.1.8 Authentication of the home SwMI when migrated . 24
4.1.9 Mutual Authentication of MS and infrastructure when migrated . 25
4.2 Air Interface key management mechanisms . 26
4.2.1 The DCK . 26
4.2.2 The GCK . 27
4.2.2.1 Session key modifier GCK0 . 28
4.2.3 The CCK . 28
4.2.4 The SCK . 29
4.2.4.1 SCK association for DMO use . 31
4.2.4.1.1 DMO SCK subset grouping . 31
4.2.5 The GSKO . 34
4.2.5.1 SCK distribution to groups with OTAR . 35
4.2.5.2 GCK distribution to groups with OTAR . 35
4.2.5.3 Rules for MS response to group key distribution . 36
4.2.6 Encrypted Short Identity (ESI) mechanism . 36
4.2.7 Encryption Cipher Key . 37
4.2.8 Summary of AI key management mechanisms . 37
4.3 Service description and primitives . 39
4.3.1 Authentication primitives . 39
4.3.2 SCK transfer primitives . 39
4.3.3 GCK transfer primitives . 40
4.3.4 GSKO transfer primitives . 41
4.4 Authentication protocol . 42
4.4.1 Authentication state transitions . 42
4.4.2 Authentication protocol sequences and operations . 45
4.4.2.1 MSCs for authentication . 46
4.4.2.2 MSCs for authentication Type-3 element . 52
4.4.2.3 Control of authentication timer T354 at MS . 55
4.5 OTAR protocols . 56
4.5.1 CCK delivery - protocol functions . 56
4.5.1.1 SwMI-initiated CCK provision . 56
4.5.1.2 MS-initiated CCK provision with U-OTAR CCK demand. 58
4.5.1.3 MS-initiated CCK provision with announced cell reselection . 59
4.5.2 OTAR protocol functions - SCK . 59
4.5.2.1 MS requests provision of SCK(s) . 60
4.5.2.2 SwMI provides SCK(s) to individual MS . 61
ETSI
---------------------- Page: 3 ----------------------
4 ETSI EN 300 392-7 V3.2.1 (2010-06)
4.5.2.3 SwMI provides SCK(s) to group of MSs . 64
4.5.2.4 SwMI rejects provision of SCK . 66
4.5.3 OTAR protocol functions - GCK . 66
4.5.3.1 MS requests provision of GCK . 66
4.5.3.2 SwMI provides GCK to an individual MS . 69
4.5.3.3 SwMI provides GCK to a group of MSs . 71
4.5.3.4 SwMI rejects provision of GCK . 73
4.5.4 Cipher key association to group address . 73
4.5.4.1 SCK association for DMO . 74
4.5.4.2 GCK association . 78
4.5.5 Notification of key change over the air . 80
4.5.5.1 Change of DCK . 82
4.5.5.2 Change of CCK . 82
4.5.5.3 Change of GCK . 82
4.5.5.4 Change of SCK for TMO . 82
4.5.5.5 Change of SCK for DMO . 83
4.5.5.6 Synchronization of Cipher Key Change . 83
4.5.6 Security class change . 83
4.5.6.1 Change of security class to security class 1 . 84
4.5.6.2 Change of security class to security class 2 . 84
4.5.6.3 Change of security class to security class 3 . 84
4.5.6.4 Change of security class to security class 3 with GCK . 85
4.5.7 Notification of key in use . 85
4.5.8 Notification of GCK Activation/Deactivation . 85
4.5.9 Deletion of SCK, GCK and GSKO . 85
4.5.10 Air Interface Key Status Enquiry . 87
4.5.11 Crypto management group . 90
4.5.12 OTAR retry mechanism . 90
4.5.13 OTAR protocol functions - GSKO . 91
4.5.13.1 MS requests provision of GSKO . 91
4.5.13.2 SwMI provides GSKO to an MS . 92
4.5.13.3 SwMI rejects provision of GSKO . 93
4.5.14 OTAR protocol functions - interaction and queuing . 93
4.5.15 KSOv for OTAR operations in visited SwMI . 93
4.5.16 Transfer of AI cipher keys across the ISI . 97
5 Enable and disable mechanism . 97
5.1 General relationships . 98
5.2 Enable/disable state transitions . 98
5.3 Mechanisms . 99
5.3.1 Disable of MS equipment . 100
5.3.2 Disable of an subscription . 100
5.3.3 Disable of subscription and equipment . 100
5.3.4 Enable an MS equipment . 100
5.3.5 Enable an MS subscription . 100
5.3.6 Enable an MS equipment and subscription . 100
5.4 Enable/disable protocol . 101
5.4.1 General case . 101
5.4.2 Status of cipher key material. 102
5.4.2.1 Permanently disabled state . 102
5.4.2.2 Temporarily disabled state . 102
5.4.3 Specific protocol exchanges . 103
5.4.3.1 Disabling an MS with mutual authentication . 103
5.4.3.2 Enabling an MS with mutual authentication . 105
5.4.3.3 Enabling an MS with non-mutual authentication . 106
5.4.3.4 Disabling an MS with non-mutual authentication . 107
5.4.4 Enabling an MS without authentication . 108
5.4.5 Disabling an MS without authentication . 109
5.4.6 Rejection of enable or disable command . 109
5.4.6a Expiry of Enable/Disable protocol timer . 110
5.4.7 MM service primitives . 111
5.4.7.1 TNMM-DISABLING primitive . 111
ETSI
---------------------- Page: 4 ----------------------
5 ETSI EN 300 392-7 V3.2.1 (2010-06)
5.4.7.2 TNMM-ENABLING primitive . 111
6 Air Interface (AI) encryption . 111
6.1 General principles. 111
6.2 Security class . 112
6.2.0 Notification of security class . 113
6.2.0.1 Security Class of Neighbouring Cells . 113
6.2.0.2 Identification of MS security capabilities . 113
6.2.1 Constraints on LA arising from cell class . 114
6.3 Key Stream Generator (KSG) . 114
6.3.1 KSG numbering and selection . 114
6.3.2 Interface parameters . 115
6.3.2.1 Initial Value (IV) . 115
6.3.2.2 Cipher Key . 115
6.4 Encryption mechanism . 116
6.4.1 Allocation of KSS to logical channels . 116
6.4.2 Allocation of KSS to logical channels with PDU association . 118
6.4.2.1 General . 118
6.4.2.2 KSS allocation on phase modulation channels . 118
6.4.2.3 KSS allocation on QAM channels . 120
6.4.2.3.1 Fixed mapping . 120
6.4.2.3.2 Offset mapping . 121
6.4.3 Synchronization of data calls where data is multi-slot interleaved . 122
6.4.4 Recovery of stolen frames from interleaved data . 123
6.5 Use of cipher keys . 123
6.5.1 Identification of encryption state of downlink MAC PDUs . 124
6.5.1.1 Class 1 cells . 124
6.5.1.2 Class 2 cells . 125
6.5.1.3 Class 3 cells . 125
6.5.2 Identification of encryption state of uplink MAC PDUs . 125
6.6 Mobility procedures . 126
6.6.1 General requirements . 126
6.6.1.1 Additional requirements for class 3 systems . 126
6.6.2 Protocol description . 126
6.6.2.1 Negotiation of ciphering parameters . 126
6.6.2.1.1 Class 1 cells . 126
6.6.2.1.2 Class 2 cells . 127
6.6.2.1.3 Class 3 cells . 127
6.6.2.2 Initial and undeclared cell re-selection . 127
6.6.2.3 Unannounced cell re-selection . 128
6.6.2.4 Announced cell re-selection type-3 . 129
6.6.2.5 Announced cell re-selection type-2 . 129
6.6.2.6 Announced cell re-selection type-1 . 129
6.6.2.7 Key forwarding . 129
6.7 Encryption control . 131
6.7.1 Data to be encrypted . 131
6.7.1.1 Downlink control channel requirements . 131
6.7.1.2 Encryption of MAC header elements . 131
6.7.1.3 Traffic channel encryption control . 131
6.7.1.4 Handling of PDUs that do not conform to negotiated ciphering mode . 132
6.7.2 Service description and primitives . 132
6.7.2.1 Mobility Management (MM) . 133
6.7.2.2 Mobile Link Entity (MLE) . 133
6.7.2.3 Layer 2 . 135
6.7.3 Protocol functions . 135
6.7.3.1 MM . 135
6.7.3.2 MLE . 135
6.7.3.3 LLC . 135
6.7.3.4 MAC . 136
6.7.4 PDUs for cipher negotiation . 136
Annex A (normative): PDU and element definitions . 137
ETSI
---------------------- Page: 5 ----------------------
6 ETSI EN 300 392-7 V3.2.1 (2010-06)
A.1 Authentication PDUs . 137
A.1.1 D-AUTHENTICATION demand .
...
Final draft ETSI EN 300 392-7 V3.2.0 (2010-02)
European Standard (Telecommunications series)
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 7: Security
---------------------- Page: 1 ----------------------
2 Final draft ETSI EN 300 392-7 V3.2.0 (2010-02)
Reference
REN/TETRA-06179
Keywords
security, TETRA, V+D
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2010.
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3 Final draft ETSI EN 300 392-7 V3.2.0 (2010-02)
Contents
Intellectual Property Rights . 10
Foreword . 10
1 Scope . 12
2 References . 12
2.1 Normative references . 13
2.2 Informative references . 13
3 Definitions and abbreviations . 14
3.1 Definitions . 14
3.2 Abbreviations . 16
4 Air Interface authentication and key management mechanisms . 18
4.0 Security classes . 18
4.1 Air interface authentication mechanisms . 19
4.1.1 Overview . 19
4.1.2 Authentication of an MS . 19
4.1.3 Authentication of the infrastructure . 20
4.1.4 Mutual authentication of MS and infrastructure . 21
4.1.5 The authentication key . 23
4.1.6 Equipment authentication . 23
4.1.7 Authentication of an MS when migrated . 24
4.1.8 Authentication of the home SwMI when migrated . 24
4.1.9 Mutual Authentication of MS and infrastructure when migrated . 25
4.2 Air Interface key management mechanisms . 26
4.2.1 The DCK . 26
4.2.2 The GCK . 27
4.2.2.1 Session key modifier GCK0 . 28
4.2.3 The CCK . 28
4.2.4 The SCK . 29
4.2.4.1 SCK association for DMO use . 31
4.2.4.1.1 DMO SCK subset grouping . 31
4.2.5 The GSKO . 34
4.2.5.1 SCK distribution to groups with OTAR . 35
4.2.5.2 GCK distribution to groups with OTAR . 35
4.2.5.3 Rules for MS response to group key distribution . 36
4.2.6 Encrypted Short Identity (ESI) mechanism . 36
4.2.7 Encryption Cipher Key . 37
4.2.8 Summary of AI key management mechanisms . 37
4.3 Service description and primitives . 39
4.3.1 Authentication primitives . 39
4.3.2 SCK transfer primitives . 39
4.3.3 GCK transfer primitives . 40
4.3.4 GSKO transfer primitives . 41
4.4 Authentication protocol . 42
4.4.1 Authentication state transitions . 42
4.4.2 Authentication protocol sequences and operations . 45
4.4.2.1 MSCs for authentication . 46
4.4.2.2 MSCs for authentication Type-3 element . 52
4.4.2.3 Control of authentication timer T354 at MS . 55
4.5 OTAR protocols . 56
4.5.1 CCK delivery - protocol functions . 56
4.5.1.1 SwMI-initiated CCK provision . 56
4.5.1.2 MS-initiated CCK provision with U-OTAR CCK demand. 58
4.5.1.3 MS-initiated CCK provision with announced cell reselection . 59
4.5.2 OTAR protocol functions - SCK . 59
4.5.2.1 MS requests provision of SCK(s) . 60
4.5.2.2 SwMI provides SCK(s) to individual MS . 61
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4 Final draft ETSI EN 300 392-7 V3.2.0 (2010-02)
4.5.2.3 SwMI provides SCK(s) to group of MSs . 64
4.5.2.4 SwMI rejects provision of SCK . 66
4.5.3 OTAR protocol functions - GCK . 66
4.5.3.1 MS requests provision of GCK . 66
4.5.3.2 SwMI provides GCK to an individual MS . 69
4.5.3.3 SwMI provides GCK to a group of MSs . 71
4.5.3.4 SwMI rejects provision of GCK . 73
4.5.4 Cipher key association to group address . 73
4.5.4.1 SCK association for DMO . 74
4.5.4.2 GCK association . 78
4.5.5 Notification of key change over the air . 80
4.5.5.1 Change of DCK . 82
4.5.5.2 Change of CCK . 82
4.5.5.3 Change of GCK . 82
4.5.5.4 Change of SCK for TMO . 82
4.5.5.5 Change of SCK for DMO . 83
4.5.5.6 Synchronization of Cipher Key Change . 83
4.5.6 Security class change . 83
4.5.6.1 Change of security class to security class 1 . 84
4.5.6.2 Change of security class to security class 2 . 84
4.5.6.3 Change of security class to security class 3 . 84
4.5.6.4 Change of security class to security class 3 with GCK . 85
4.5.7 Notification of key in use . 85
4.5.8 Notification of GCK Activation/Deactivation . 85
4.5.9 Deletion of SCK, GCK and GSKO . 85
4.5.10 Air Interface Key Status Enquiry . 87
4.5.11 Crypto management group . 90
4.5.12 OTAR retry mechanism . 90
4.5.13 OTAR protocol functions - GSKO . 91
4.5.13.1 MS requests provision of GSKO . 91
4.5.13.2 SwMI provides GSKO to an MS . 92
4.5.13.3 SwMI rejects provision of GSKO . 93
4.5.14 OTAR protocol functions - interaction and queuing . 93
4.5.15 KSOv for OTAR operations in visited SwMI . 93
4.5.16 Transfer of AI cipher keys across the ISI . 97
5 Enable and disable mechanism . 97
5.1 General relationships . 98
5.2 Enable/disable state transitions . 98
5.3 Mechanisms . 99
5.3.1 Disable of MS equipment . 100
5.3.2 Disable of an subscription . 100
5.3.3 Disable of subscription and equipment . 100
5.3.4 Enable an MS equipment . 100
5.3.5 Enable an MS subscription . 100
5.3.6 Enable an MS equipment and subscription . 100
5.4 Enable/disable protocol . 101
5.4.1 General case . 101
5.4.2 Status of cipher key material. 102
5.4.2.1 Permanently disabled state . 102
5.4.2.2 Temporarily disabled state . 102
5.4.3 Specific protocol exchanges . 103
5.4.3.1 Disabling an MS with mutual authentication . 103
5.4.3.2 Enabling an MS with mutual authentication . 105
5.4.3.3 Enabling an MS with non-mutual authentication . 106
5.4.3.4 Disabling an MS with non-mutual authentication . 107
5.4.4 Enabling an MS without authentication . 108
5.4.5 Disabling an MS without authentication . 109
5.4.6 Rejection of enable or disable command . 109
5.4.6a Expiry of Enable/Disable protocol timer . 110
5.4.7 MM service primitives . 111
5.4.7.1 TNMM-DISABLING primitive . 111
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5 Final draft ETSI EN 300 392-7 V3.2.0 (2010-02)
5.4.7.2 TNMM-ENABLING primitive . 111
6 Air Interface (AI) encryption . 111
6.1 General principles. 111
6.2 Security class . 112
6.2.0 Notification of security class . 113
6.2.0.1 Security Class of Neighbouring Cells . 113
6.2.0.2 Identification of MS security capabilities . 113
6.2.1 Constraints on LA arising from cell class . 114
6.3 Key Stream Generator (KSG) . 114
6.3.1 KSG numbering and selection . 114
6.3.2 Interface parameters . 115
6.3.2.1 Initial Value (IV) . 115
6.3.2.2 Cipher Key . 115
6.4 Encryption mechanism . 116
6.4.1 Allocation of KSS to logical channels . 116
6.4.2 Allocation of KSS to logical channels with PDU association . 118
6.4.2.1 General . 118
6.4.2.2 KSS allocation on phase modulation channels . 118
6.4.2.3 KSS allocation on QAM channels . 120
6.4.2.3.1 Fixed mapping . 120
6.4.2.3.2 Offset mapping . 121
6.4.3 Synchronization of data calls where data is multi-slot interleaved . 122
6.4.4 Recovery of stolen frames from interleaved data . 123
6.5 Use of cipher keys . 123
6.5.1 Identification of encryption state of downlink MAC PDUs . 124
6.5.1.1 Class 1 cells . 124
6.5.1.2 Class 2 cells . 125
6.5.1.3 Class 3 cells . 125
6.5.2 Identification of encryption state of uplink MAC PDUs . 125
6.6 Mobility procedures . 126
6.6.1 General requirements . 126
6.6.1.1 Additional requirements for class 3 systems . 126
6.6.2 Protocol description . 126
6.6.2.1 Negotiation of ciphering parameters . 126
6.6.2.1.1 Class 1 cells . 126
6.6.2.1.2 Class 2 cells . 127
6.6.2.1.3 Class 3 cells . 127
6.6.2.2 Initial and undeclared cell re-selection . 127
6.6.2.3 Unannounced cell re-selection . 128
6.6.2.4 Announced cell re-selection type-3 . 129
6.6.2.5 Announced cell re-selection type-2 . 129
6.6.2.6 Announced cell re-selection type-1 . 129
6.6.2.7 Key forwarding . 129
6.7 Encryption control . 131
6.7.1 Data to be encrypted . 131
6.7.1.1 Downlink control channel requirements . 131
6.7.1.2 Encryption of MAC header elements . 131
6.7.1.3 Traffic channel encryption control . 131
6.7.1.4 Handling of PDUs that do not conform to negotiated ciphering mode . 132
6.7.2 Service description and primitives . 132
6.7.2.1 Mobility Management (MM) . 133
6.7.2.2 Mobile Link Entity (MLE) . 133
6.7.2.3 Layer 2 . 135
6.7.3 Protocol functions . 135
6.7.3.1 MM . 135
6.7.3.2 MLE . 135
6.7.3.3 LLC . 135
6.7.3.4 MAC . 136
6.7.4 PDUs for cipher negotiation . 136
Annex A (normative): PDU and element definitions . 137
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6 Final draft ETSI EN 300 392-7 V3.2.0 (2010-02)
A.1 Authentication PDUs . 137
A.1.1 D-AUTH
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