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TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
3G security;
Security architecture
(3GPP TS 33.102 version 15.1.0 Release 15)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
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3GPP TS 33.102 version 15.1.0 Release 15 1 ETSI TS 133 102 V15.1.0 (2019-04)
Reference
RTS/TSGS-0333102vf10
Keywords
GSM,SECURITY,UMTS
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3GPP TS 33.102 version 15.1.0 Release 15 2 ETSI TS 133 102 V15.1.0 (2019-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 33.102 version 15.1.0 Release 15 3 ETSI TS 133 102 V15.1.0 (2019-04)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Definitions, symbols abbreviations and conventions . 10
3.1 Definitions . 10
3.2 Symbols . 11
3.3 Abbreviations . 11
3.4 Conventions . 12
4 Overview of the security architecture. 12
5 Security features . 14
5.1 Network access security . 14
5.1.1 User identity confidentiality . 14
5.1.2 Entity authentication . 14
5.1.3 Confidentiality . 14
5.1.4 Data integrity . 15
5.1.5 Mobile equipment identification . 15
5.2 Network domain security . 15
5.2.1 Void . 15
5.2.2 Void . 15
5.2.3 Void . 15
5.2.4 Fraud information gathering system . 15
5.3 User domain security . 16
5.3.1 User-to-USIM authentication. 16
5.3.2 USIM-Terminal Link . 16
5.4 Application security . 16
5.4.1 Secure messaging between the USIM and the network . 16
5.4.2 Void . 16
5.4.3 Void . 16
5.4.4 Void . 16
5.5 Security visibility and configurability . 16
5.5.1 Visibility . 16
5.5.2 Configurability . 17
6 Network access security mechanisms . 17
6.1 Identification by temporary identities. 17
6.1.1 General . 17
6.1.2 TMSI reallocation procedure . 17
6.1.3 Unacknowledged allocation of a temporary identity . 18
6.1.4 Location update . 18
6.2 Identification by a permanent identity . 18
6.3 Authentication and key agreement . 19
6.3.1 General . 19
6.3.2 Distribution of authentication data from HE to SN . 20
6.3.3 Authentication and key agreement . 22
6.3.4 Distribution of IMSI and temporary authentication data within one serving network domain . 25
6.3.5 Re-synchronisation procedure . 26
6.3.6 Reporting authentication failures from the SGSN/VLR to the HLR . 26
6.3.6.1 Authentication re-attempt . 27
6.3.7 Length of authentication parameters . 27
6.4 Local authentication and connection establishment . 28
6.4.1 Cipher key and integrity key setting . 28
ETSI
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3GPP TS 33.102 version 15.1.0 Release 15 4 ETSI TS 133 102 V15.1.0 (2019-04)
6.4.2 Ciphering and integrity mode negotiation . 28
6.4.3 Cipher key and integrity key lifetime . 29
6.4.4 Cipher key and integrity key identification . 29
6.4.5 Security mode set-up procedure . 30
6.4.6 Signalling procedures in the case of an unsuccessful integrity check . 33
6.4.7 Signalling procedure for periodic local authentication . 33
6.4.8 Initialisation of synchronisation for ciphering and integrity protection . 33
6.4.9 Emergency call handling . 34
6.4.9.1 Security procedures applied . 34
6.4.9.2 Security procedures not applied . 34
6.5 Access link data integrity . 35
6.5.1 General . 35
6.5.2 Layer of integrity protection . 35
6.5.3 Data integrity protection method . 35
6.5.4 Input parameters to the integrity algorithm . 36
6.5.4.1 COUNT-I . 36
6.5.4.2 IK . 36
6.5.4.3 FRESH . 36
6.5.4.4 DIRECTION . 37
6.5.4.5 MESSAGE . 37
6.5.5 Integrity key selection . 37
6.5.6 UIA identification . 37
6.6 Access link data confidentiality . 37
6.6.1 General . 37
6.6.2 Layer of ciphering . 38
6.6.3 Ciphering method . 38
6.6.4 Input parameters to the cipher algorithm . 38
6.6.4.1 COUNT-C . 38
6.6.4.2 CK . 39
6.6.4.3 BEARER . 40
6.6.4.4 DIRECTION . 40
6.6.4.5 LENGTH . 40
6.6.5 Cipher key selection. 40
6.6.6 UEA identification . 40
6.7 Void . 41
6.8 Interoperation and handover between UMTS and GSM . 41
6.8.1 Authentication and key agreement of UMTS subscribers . 41
6.8.1.1 General . 41
6.8.1.2 R99+ HLR/AuC . 42
6.8.1.3 R99+ VLR/SGSN . 43
6.8.1.4 R99+ ME . 44
6.8.1.5 USIM . 44
6.8.2 Authentication and key agreement for GSM subscribers. 45
6.8.2.1 General . 45
6.8.2.2 R99+ HLR/AuC . 46
6.8.2.3 VLR/SGSN . 46
6.8.2.4 R99+ ME . 47
6.8.3 Distribution and use of authentication data between VLRs/SGSNs . 47
6.8.4 Intersystem handover for CS Services – from UTRAN to GSM BSS . 48
6.8.4.1 UMTS security context . 48
6.8.4.2 GSM security context . 49
6.8.5 Intersystem handover for CS Services – from GSM BSS to UTRAN . 49
6.8.5.1 UMTS security context . 49
6.8.5.2 GSM security context . 50
6.8.6 Intersystem change for PS Services – from UTRAN to GSM BSS . 50
6.8.6.1 UMTS security context . 50
6.8.6.2 GSM security context . 51
6.8.7 Intersystem change for PS services – from GSM BSS to UTRAN. 51
6.8.7.1 UMTS security context . 51
6.8.7.2 GSM security context . 51
6.8.8 PS handover from Iu to Gb mode . 52
6.8.8.1 UMTS security context . 52
ETSI
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3GPP TS 33.102 version 15.1.0 Release 15 5 ETSI TS 133 102 V15.1.0 (2019-04)
6.8.8.2 GSM security context . 52
6.8.9 PS handover from Gb to Iu mode . 52
6.8.9.1 UMTS security context . 52
6.8.9.2 GSM security context . 53
6.8.10 SRVCC – between HSPA and UTRAN/GERAN . 53
6.8.10.1 SRVCC from HSPA to circuit switched UTRAN/GERAN . 53
6.8.10.2 SRVCC from circuit switched GERAN to HSPA . 55
6.8.11 Handling of the START value in intersystem mobility cases . 57
7 Void . 58
8 Application security mechanisms . 58
8.1 Void . 58
8.2 Void . 58
8.3 Mobile IP security . 58
Annex A: Void . 59
Annex B (normative): Key derivation function . 60
B.1 General . 60
B.2 FC value allocations . 60
B.3 Derivation of CK’ || IK’ from CK ||IK . 60
CS CS PS PS
B.4 Derivation of Kc’ from Kc for HSPA to UTRAN/GERAN SRVCC handover . 60
B.5 Derivation of Kc . 60
128
B.6 Derivation of CK' || IK' from CK || IK . 61
PS PS CS CS
B.7 Derivation of Kc' from Kc for UTRAN/GERAN to HSPA SRVCC handover . 61
Annex C (informative): Management of sequence numbers . 62
C.1 Generation of sequence numbers in the Authentication Centre . 62
C.1.1 Sequence number generation schemes . 62
C.1.1.1 General scheme . 62
C.1.1.2 Generation of sequence numbers which are not time-based . 63
C.1.1.3 Time-based sequence number generation . 63
C.1.2 Support for the array mechanism . 63
C.2 Handling of sequence numbers in the USIM . 63
C.2.1 Protection against wrap around of counter in the USIM . 64
C.2.2 Verification of sequence number freshness in the USIM . 64
C.2.3 Notes . 64
C.3 Sequence number management profiles . 65
C.3.1 Profile 1: management of sequence numbers which are partly time-based . 65
C.3.2 Profile 2: management of sequence numbers which are not time-based . 66
C.3.3 Profile 3: management of sequence numbers which are entirely time-based . 66
C.3.4 Guidelines for the allocation of the index values in the array scheme . 67
C.4 Guidelines for interoperability in a multi-vendor environment . 67
Annex D: Void . 68
Annex E: Void . 69
Annex F (informative): Example uses of the proprietary part of the AMF . 70
F.1 Support multiple authentication algorithms and keys . 70
F.2 Changing sequence number verification parameters . 70
F.3 Setting threshold values to restrict the lifetime of cipher and integri
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