ETSI TS 133 102 V16.0.0 (2020-08)

ETSI TS 133 102 V16.0.0 (2020-08)
TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
3G security;
Security architecture
(3GPP TS 33.102 version 16.0.0 Release 16)
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
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3GPP TS 33.102 version 16.0.0 Release 16 1 ETSI TS 133 102 V16.0.0 (2020-08)
Reference
RTS/TSGS-0333102vg00
Keywords
GSM,SECURITY,UMTS
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Intellectual Property Rights ................................................................................................................................ 2

Legal Notice ....................................................................................................................................................... 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 ........................................................................................................... 16

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 .............................................................................................................. 17

5.5.1 Visibility ..................................................................................................................................................... 17

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 ...................................................................................................................... 18

6.1.3 Unacknowledged allocation of a temporary identity .................................................................................. 18

6.1.4 Location update .......................................................................................................................................... 18

6.2 Identification by a permanent identity .............................................................................................................. 19

6.3 Authentication and key agreement ................................................................................................................... 19

6.3.1 General ........................................................................................................................................................ 19

6.3.2 Distribution of authentication data from HE to SN .................................................................................... 21

6.3.3 Authentication and key agreement .............................................................................................................. 23

6.3.4 Distribution of IMSI and temporary authentication data within one serving network domain ................... 26

6.3.5 Re-synchronisation procedure .................................................................................................................... 27

6.3.6 Reporting authentication failures from the SGSN/VLR to the HLR .......................................................... 28

6.3.6.1 Authentication re-attempt ...................................................................................................................... 28

6.3.7 Length of authentication parameters ........................................................................................................... 29

6.4 Local authentication and connection establishment ......................................................................................... 29

6.4.1 Cipher key and integrity key setting ........................................................................................................... 29

6.4.2 Ciphering and integrity mode negotiation .................................................................................................. 29

6.4.3 Cipher key and integrity key lifetime ......................................................................................................... 30

6.4.4 Cipher key and integrity key identification ................................................................................................. 30

6.4.5 Security mode set-up procedure .................................................................................................................. 31

6.4.6 Signalling procedures in the case of an unsuccessful integrity check ......................................................... 34

6.4.7 Signalling procedure for periodic local authentication ............................................................................... 34

6.4.8 Initialisation of synchronisation for ciphering and integrity protection ...................................................... 34

6.4.9 Emergency call handling ............................................................................................................................ 35

6.4.9.1 Security procedures applied .................................................................................................................. 35

6.4.9.2 Security procedures not applied ............................................................................................................ 35

6.5 Access link data integrity ................................................................................................................................. 36

6.5.1 General ........................................................................................................................................................ 36

6.5.2 Layer of integrity protection ....................................................................................................................... 36

6.5.3 Data integrity protection method ................................................................................................................ 36

6.5.4 Input parameters to the integrity algorithm ................................................................................................. 37

6.5.4.1 COUNT-I .............................................................................................................................................. 37

6.5.4.2 IK .......................................................................................................................................................... 37

6.5.4.3 FRESH .................................................................................................................................................. 37

6.5.4.4 DIRECTION ......................................................................................................................................... 38

6.5.4.5 MESSAGE ............................................................................................................................................ 38

6.5.5 Integrity key selection ................................................................................................................................. 38

6.5.6 UIA identification ....................................................................................................................................... 38

6.6 Access link data confidentiality ........................................................................................................................ 39

6.6.1 General ........................................................................................................................................................ 39

6.6.2 Layer of ciphering ....................................................................................................................................... 39

6.6.3 Ciphering method ....................................................................................................................................... 39

6.6.4 Input parameters to the cipher algorithm .................................................................................................... 40

6.6.4.1 COUNT-C ............................................................................................................................................. 40

6.6.4.2 CK ......................................................................................................................................................... 40

6.6.4.3 BEARER ............................................................................................................................................... 41

6.6.4.4 DIRECTION ......................................................................................................................................... 41

6.6.4.5 LENGTH ............................................................................................................................................... 41

6.6.5 Cipher key selection.................................................................................................................................... 41

6.6.6 UEA identification ...................................................................................................................................... 42

6.7 Void .................................................................................................................................................................. 42

6.8 Interoperation and handover between UMTS and GSM .................................................................................. 42

6.8.1 Authentication and key agreement of UMTS subscribers .......................................................................... 42

6.8.1.1 General .................................................................................................................................................. 42

6.8.1.2 R99+ HLR/AuC .................................................................................................................................... 43

6.8.1.3 R99+ VLR/SGSN ................................................................................................................................. 44

6.8.1.4 R99+ ME ............................................................................................................................................... 45

6.8.1.5 USIM ..................................................................................................................................................... 45

6.8.2 Authentication and key agreement for GSM subscribers............................................................................ 46

6.8.2.1 General .................................................................................................................................................. 46

6.8.2.2 R99+ HLR/AuC .................................................................................................................................... 47

6.8.2.3 VLR/SGSN ........................................................................................................................................... 47

6.8.2.4 R99+ ME ............................................................................................................................................... 48

6.8.3 Distribution and use of authentication data between VLRs/SGSNs ........................................................... 48

6.8.4 Intersystem handover for CS Services – from UTRAN to GSM BSS ........................................................ 49

6.8.4.1 UMTS security context ......................................................................................................................... 49

6.8.4.2 GSM security context ............................................................................................................................ 50

6.8.5 Intersystem handover for CS Services – from GSM BSS to UTRAN ........................................................ 50

6.8.5.1 UMTS security context ......................................................................................................................... 50

6.8.5.2 GSM security context ............................................................................................................................ 51

6.8.6 Intersystem change for PS Services – from UTRAN to GSM BSS ............................................................ 51

6.8.6.1 UMTS security context ......................................................................................................................... 51

6.8.6.2 GSM security context ............................................................................................................................ 52

6.8.7 Intersystem change for PS services – from GSM BSS to UTRAN............................................................. 52

6.8.7.1 UMTS security context ......................................................................................................................... 52

6.8.7.2 GSM security context ............................................................................................................................ 52

6.8.8 PS handover from Iu to Gb mode ............................................................................................................... 53

6.8.8.1 UMTS security context ......................................................................................................................... 53

6.8.8.2 GSM security context ............................................................................................................................ 53

6.8.9 PS handover from Gb to Iu mode ............................................................................................................... 54

6.8.9.1 UMTS security context ......................................................................................................................... 54

6.8.9.2 GSM security context ............................................................................................................................ 54

6.8.10 SRVCC – between HSPA and UTRAN/GERAN ...................................................................................... 54

6.8.10.1 SRVCC from HSPA to circuit switched UTRAN/GERAN .................................................................. 54

6.8.10.2 SRVCC from circuit switched GERAN to HSPA ................................................................................. 56

6.8.11 Handling of the START value in intersystem mobility cases ..................................................................... 58

7 Void ........................................................................................................................................................ 59

8 Application security mechanisms ........................................................................................................... 59

8.1 Void .................................................................................................................................................................. 59

8.2 Void .................................................................................................................................................................. 59

8.3 Mobile IP security ............................................................................................................................................ 59

Annex A: Void ................................................................................................................. 60

Annex B (normative): Key derivation function ................................................................................. 61

B.1 General ................................................................................................................................................... 61

B.2 FC value allocations ............................................................................................................................... 61

B.3 Derivation of CK’ || IK’ from CK ||IK .......................................................................................... 61

B.4 Derivation of Kc’ from Kc for HSPA to UTRAN/GERAN SRVCC handover ..................................... 61

B.5 Derivation of Kc ................................................................................................................................. 61

B.6 Derivation of CK' || IK' from CK || IK ......................................................................................... 62

B.7 Derivation of Kc' from Kc for UTRAN/GERAN to HSPA SRVCC handover ..................................... 62

Annex C (informative): Management of sequence numbers .............................................................. 63

C.1 Generation of sequence numbers in the Authentication Centre ............................................................. 63

C.1.1 Sequence number generation schemes ............................................................................................................. 63

C.1.1.1 General scheme ........................................................................................................................................... 63

C.1.1.2 Generation of sequence numbers which are not time-based ....................................................................... 64

C.1.1.3 Time-based sequence number generation ................................................................................................... 64

C.1.2 Support for the array mechanism ..................................................................................................................... 64

C.2 Handling of sequence numbers in the USIM ......................................................................................... 64

C.2.1 Protection against wrap around of counter in the USIM .................................................................................. 65

C.2.2 Verification of sequence number freshness in the USIM ................................................................................. 65

C.2.3 Notes ................................................................................................................................................................ 65

C.3 Sequence number management profiles ................................................................................................. 66

C.3.1 Profile 1: management of sequence numbers which are partly time-based ...................................................... 66

C.3.2 Profile 2: management of sequence numbers which are not time-based .......................................................... 67

C.3.3 Profile 3: management of sequence numbers which are entirely time-based ................................................... 67

C.3.4 Guidelines for the allocation of the index values in the array scheme ............................................................. 68

C.4 Guidelines for interoperability in a multi-vendor environment .............................................................. 68

Annex D: Void ........................................................................................................................................ 69

Annex E: Void ........................................................................................................................................ 70

Annex F (informative): Example uses of the proprietary part of the AMF ...................................... 71

F.1 Support multiple authentication algorithms and keys ............................................................................ 71

F.2 Changing sequence number verification parameters .............................................................................. 71

F.3 Setting threshold values to restrict the lifetime of cipher and integrity keys ......................................... 71