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Spec #CR #Revision #Impacted VersionTarget ReleaseTitleWG TDoc #WG statusTSG TDoc #TSG statusNew Version
03.20A025-8.2.0R1999Clarification on A5 algorithm support Details S3-060378 agreedSP-060374approved8.3.0
03.20A024-8.1.0R1999Recommendation not to support A5/2 in new terminals Details S3-060146 agreedSP-060046approved8.2.0
03.20A023-8.0.0R1999GPRS Ciphering algorithm negotiation Details S3-000252 agreedP-00-309approved 
03.20A022-7.2.0R1998GPRS Ciphering algorithm negotiation Details S3-000252 agreedP-00-309approved 
03.20A021-8.0.0R1999GPRS encryption  P-00-126postponed 
03.20A020-7.2.0R1998GPRS encryption  P-00-126postponed 
03.20A019-6.1.0R1997GPRS encryption  P-00-126postponed 
03.20A018-7.1.0R1998Clarification on security triplet re-use conditions Details AP99-112  P-99-743approved7.2.0
03.20A017- R1999Introduction of EDGE variant of A5 algorithm Details AP99-100  P-99-743approved8.0.0
03.20A01647.0.0R1998Correction of the handling of the Ciphering Key Sequence Number (CKSN) Details N1-99354  P-99-456approved7.1.0
03.20A015-5.2.1R1996Clarification on security triplet re-use conditions Details AP99-050 agreedp-99-530postponed 
03.20A014-7.0.0R1998CTS Security functions in case of license exempt frequencies Details AP99-030 agreedp-99-530approved7.1.0
03.20A013-7.0.0R1998Introduction of CTS-FP authentication and signature generation by CTS-SN. Details AP99-055 agreedp-99-530approved7.1.0
03.20A012- R1997Clarification on security triplet re-use conditions Details AP99-051 agreedp-99-530postponed 
03.20A0114 R1997Correction of the handling of the Ciphering Key Sequence Number (CKSN) Details N1-99354  P-99-456approved6.1.0
03.20A010- R1998Proposed annex E on CTS security  P-99-117approved7.0.0
03.20A0071 R1997GPRS security Details 183/97 agreed97-778approved 
03.20A0061 R1997GPRS interaction with existing security mechanisms Details 182/97 agreed97-778approved 
03.20A00415.0.0R1996Ciphering Algorithm(s) support (phase 2+) Details 97P131 agreed181/97approved5.1.0
03.20A00334.3.2Ph2Ciphering Algorithm(s) support (phase 2) Details 97P131 agreed181/97approved4.4.0
03.20A0024 R199603.20-A002r4 on Definition of ciphering for HSCSD Details 97P043 agreed132/97approved5.1.0
03.20A0022 R1996Definition of ciphering for HSCSD Details 96P134 agreed-approved5.1.0
03.20A001- Ph2Length of ciphering key Kc for signalling and testing purposes  157/96approved4.3.2
03.200029-8.5.0R1999Recommendation to support A5/3 and explicit prohibition of non-standard A5 algorithms in MS Details S3-070887 agreedSP-070784approved8.6.0
03.20002828.4.1R1999Prohibiting A5/2 in mobile stations and other clarifications regarding A5 algorithm support  SP-070671approved8.5.0
03.20002818.4.1R1999Prohibiting A5/2 in mobile stations and other clarifications regarding A5 algorithm support Details S3-070646 agreedSP-070593revised 
03.200028-8.4.1R1999Prohibiting A5/2 in mobile stations and other clarifications regarding A5 algorithm support Details S3-070569 revised-  
03.200027-8.3.0R1999Correction of implmentation error of A025  SP-060907approved8.4.0
03.200026-8.3.0R1999A5/2 removal from new MS Details S3-060790 agreedSP-060793rejected 
03.200025- Ph2Support of encryption algorithms Details --- agreed328/94approved4.3.0
03.2000241 Ph2Error Correction and Clarifications Details 274/94 agreed215/94approved4.3.0
03.200024- Ph2Error Correction and Clarifications Details 256/94 revised-  
03.200023- Ph2Editorial improvement Details 663/93 withdrawn-  
03.200022- Ph2Support of multiple ciphering algorithms Details 231/93 agreed453/93approved 
03.200021- Ph2Different A5 Algorithms Details 198/93 postponed-  
03.2000204 Ph2Purging of the MS in the HLR Details 929/92 postponed-  
03.2000203 Ph2Purging of the MS in the HLR Details 751/92 revised-  
03.2000202 Ph2Purging of the MS in the HLR revised-  
03.200019- Ph2-  -  
03.200018- Ph2Editorial Changes agreed on SMG3/WPC ad hoc Meeting in 1992 Details 766/92 postponed-  
03.2000172 Ph2Support of multiple ciphering algorithms  157/93approved 
03.2000171 Ph2Support of multiple ciphering algorithms Details 702/92 agreed112/93revised 
03.200017- Ph2Support of multiple ciphering algorithms revised-  
03.200016- Ph2Editorial updating (Working version 4) Details --  -approved 
03.2000152 Ph2Support of Multiple Ciphering and Authentification Algorithms Details 662/92 agreed451/92approved 
03.2000151 Ph2Support of Multiple Ciphering and Authentification Algorithms Details 616/92 revised-  
03.200015- Ph2Negotiation of A5 algorithm Details 437/92 agreed342/92approved 
03.200014- Ph2Handling of TMSI reallocation failure Details 436/92 agreed342/92approved 
03.2000132 Ph2Reuse of Authentification Triplets  385/92approved 
03.2000131 Ph2Reuse of Authentication Triplets Details 366/92 agreed342/92revised 
03.200013- Ph2Reuse of Authentication Triplets Details 263/92 revised-  
03.2000112 Ph2Transport of Ki to HLR and VLR Details 262/92 agreed342/92approved 
03.200011-3.3.2Ph1Transport of Ki to HLR and VLR  -  
03.2000102 Ph1Format of COUNT parameter Details 520/90 agreed45/91approved 
03.2000091 Ph1Clarification of COUNT parameter  329/90r1withdrawn 
03.200008- Ph1Length of the Authentication parameter RAND Details 16/90 agreed7/90approved 
03.200007- Ph1Maximum length of the security keys Ki and Kc Details 16/90 agreed7/90approved 
03.200006- Ph1Identifying method  -approved 
03.200005- Ph1Authentication procedure  -approved 
03.200004- Ph1Ciphering key sequence number  -approved 
03.200003- Ph1storage of Kc in the SIM  -approved 
03.200002- Ph1removing reference to Rec. GSM 03.21  -approved 
03.200001- Ph1Key Kc at Handover  -approved