| 03.20 | A025 | - | 8.2.0 | R1999 | Clarification on A5 algorithm support | S3-060378 | agreed | SP-060374 | approved | 8.3.0 |
| 03.20 | A024 | - | 8.1.0 | R1999 | Recommendation not to support A5/2 in new terminals | S3-060146 | agreed | SP-060046 | approved | 8.2.0 |
| 03.20 | A023 | - | 8.0.0 | R1999 | GPRS Ciphering algorithm negotiation | S3-000252 | agreed | P-00-309 | approved | |
| 03.20 | A022 | - | 7.2.0 | R1998 | GPRS Ciphering algorithm negotiation | S3-000252 | agreed | P-00-309 | approved | |
| 03.20 | A021 | - | 8.0.0 | R1999 | GPRS encryption | - | | P-00-126 | postponed | |
| 03.20 | A020 | - | 7.2.0 | R1998 | GPRS encryption | - | | P-00-126 | postponed | |
| 03.20 | A019 | - | 6.1.0 | R1997 | GPRS encryption | - | | P-00-126 | postponed | |
| 03.20 | A018 | - | 7.1.0 | R1998 | Clarification on security triplet re-use conditions | AP99-112 | | P-99-743 | approved | 7.2.0 |
| 03.20 | A017 | - | | R1999 | Introduction of EDGE variant of A5 algorithm | AP99-100 | | P-99-743 | approved | 8.0.0 |
| 03.20 | A016 | 4 | 7.0.0 | R1998 | Correction of the handling of the Ciphering Key Sequence Number (CKSN) | N1-99354 | | P-99-456 | approved | 7.1.0 |
| 03.20 | A015 | - | 5.2.1 | R1996 | Clarification on security triplet re-use conditions | AP99-050 | agreed | p-99-530 | postponed | |
| 03.20 | A014 | - | 7.0.0 | R1998 | CTS Security functions in case of license exempt frequencies | AP99-030 | agreed | p-99-530 | approved | 7.1.0 |
| 03.20 | A013 | - | 7.0.0 | R1998 | Introduction of CTS-FP authentication and signature generation by CTS-SN. | AP99-055 | agreed | p-99-530 | approved | 7.1.0 |
| 03.20 | A012 | - | | R1997 | Clarification on security triplet re-use conditions | AP99-051 | agreed | p-99-530 | postponed | |
| 03.20 | A011 | 4 | | R1997 | Correction of the handling of the Ciphering Key Sequence Number (CKSN) | N1-99354 | | P-99-456 | approved | 6.1.0 |
| 03.20 | A010 | - | | R1998 | Proposed annex E on CTS security | - | | P-99-117 | approved | 7.0.0 |
| 03.20 | A007 | 1 | | R1997 | GPRS security | 183/97 | agreed | 97-778 | approved | |
| 03.20 | A006 | 1 | | R1997 | GPRS interaction with existing security mechanisms | 182/97 | agreed | 97-778 | approved | |
| 03.20 | A004 | 1 | 5.0.0 | R1996 | Ciphering Algorithm(s) support (phase 2+) | 97P131 | agreed | 181/97 | approved | 5.1.0 |
| 03.20 | A003 | 3 | 4.3.2 | Ph2 | Ciphering Algorithm(s) support (phase 2) | 97P131 | agreed | 181/97 | approved | 4.4.0 |
| 03.20 | A002 | 4 | | R1996 | 03.20-A002r4 on Definition of ciphering for HSCSD | 97P043 | agreed | 132/97 | approved | 5.1.0 |
| 03.20 | A002 | 2 | | R1996 | Definition of ciphering for HSCSD | 96P134 | agreed | - | approved | 5.1.0 |
| 03.20 | A001 | - | | Ph2 | Length of ciphering key Kc for signalling and testing purposes | - | | 157/96 | approved | 4.3.2 |
| 03.20 | 0029 | - | 8.5.0 | R1999 | Recommendation to support A5/3 and explicit prohibition of non-standard A5 algorithms in MS | S3-070887 | agreed | SP-070784 | approved | 8.6.0 |
| 03.20 | 0028 | 2 | 8.4.1 | R1999 | Prohibiting A5/2 in mobile stations and other clarifications regarding A5 algorithm support | - | | SP-070671 | approved | 8.5.0 |
| 03.20 | 0028 | 1 | 8.4.1 | R1999 | Prohibiting A5/2 in mobile stations and other clarifications regarding A5 algorithm support | S3-070646 | agreed | SP-070593 | revised | |
| 03.20 | 0028 | - | 8.4.1 | R1999 | Prohibiting A5/2 in mobile stations and other clarifications regarding A5 algorithm support | S3-070569 | revised | - | | |
| 03.20 | 0027 | - | 8.3.0 | R1999 | Correction of implmentation error of A025 | - | | SP-060907 | approved | 8.4.0 |
| 03.20 | 0026 | - | 8.3.0 | R1999 | A5/2 removal from new MS | S3-060790 | agreed | SP-060793 | rejected | |
| 03.20 | 0025 | - | | Ph2 | Support of encryption algorithms | --- | agreed | 328/94 | approved | 4.3.0 |
| 03.20 | 0024 | 1 | | Ph2 | Error Correction and Clarifications | 274/94 | agreed | 215/94 | approved | 4.3.0 |
| 03.20 | 0024 | - | | Ph2 | Error Correction and Clarifications | 256/94 | revised | - | | |
| 03.20 | 0023 | - | | Ph2 | Editorial improvement | 663/93 | withdrawn | - | | |
| 03.20 | 0022 | - | | Ph2 | Support of multiple ciphering algorithms | 231/93 | agreed | 453/93 | approved | |
| 03.20 | 0021 | - | | Ph2 | Different A5 Algorithms | 198/93 | postponed | - | | |
| 03.20 | 0020 | 4 | | Ph2 | Purging of the MS in the HLR | 929/92 | postponed | - | | |
| 03.20 | 0020 | 3 | | Ph2 | Purging of the MS in the HLR | 751/92 | revised | - | | |
| 03.20 | 0020 | 2 | | Ph2 | Purging of the MS in the HLR | - | revised | - | | |
| 03.20 | 0019 | - | | Ph2 | - | - | | - | | |
| 03.20 | 0018 | - | | Ph2 | Editorial Changes agreed on SMG3/WPC ad hoc Meeting in 1992 | 766/92 | postponed | - | | |
| 03.20 | 0017 | 2 | | Ph2 | Support of multiple ciphering algorithms | - | | 157/93 | approved | |
| 03.20 | 0017 | 1 | | Ph2 | Support of multiple ciphering algorithms | 702/92 | agreed | 112/93 | revised | |
| 03.20 | 0017 | - | | Ph2 | Support of multiple ciphering algorithms | - | revised | - | | |
| 03.20 | 0016 | - | | Ph2 | Editorial updating (Working version 4) | -- | | - | approved | |
| 03.20 | 0015 | 2 | | Ph2 | Support of Multiple Ciphering and Authentification Algorithms | 662/92 | agreed | 451/92 | approved | |
| 03.20 | 0015 | 1 | | Ph2 | Support of Multiple Ciphering and Authentification Algorithms | 616/92 | revised | - | | |
| 03.20 | 0015 | - | | Ph2 | Negotiation of A5 algorithm | 437/92 | agreed | 342/92 | approved | |
| 03.20 | 0014 | - | | Ph2 | Handling of TMSI reallocation failure | 436/92 | agreed | 342/92 | approved | |
| 03.20 | 0013 | 2 | | Ph2 | Reuse of Authentification Triplets | - | | 385/92 | approved | |
| 03.20 | 0013 | 1 | | Ph2 | Reuse of Authentication Triplets | 366/92 | agreed | 342/92 | revised | |
| 03.20 | 0013 | - | | Ph2 | Reuse of Authentication Triplets | 263/92 | revised | - | | |
| 03.20 | 0011 | 2 | | Ph2 | Transport of Ki to HLR and VLR | 262/92 | agreed | 342/92 | approved | |
| 03.20 | 0011 | - | 3.3.2 | Ph1 | Transport of Ki to HLR and VLR | - | | - | | |
| 03.20 | 0010 | 2 | | Ph1 | Format of COUNT parameter | 520/90 | agreed | 45/91 | approved | |
| 03.20 | 0009 | 1 | | Ph1 | Clarification of COUNT parameter | - | | 329/90r1 | withdrawn | |
| 03.20 | 0008 | - | | Ph1 | Length of the Authentication parameter RAND | 16/90 | agreed | 7/90 | approved | |
| 03.20 | 0007 | - | | Ph1 | Maximum length of the security keys Ki and Kc | 16/90 | agreed | 7/90 | approved | |
| 03.20 | 0006 | - | | Ph1 | Identifying method | - | | - | approved | |
| 03.20 | 0005 | - | | Ph1 | Authentication procedure | - | | - | approved | |
| 03.20 | 0004 | - | | Ph1 | Ciphering key sequence number | - | | - | approved | |
| 03.20 | 0003 | - | | Ph1 | storage of Kc in the SIM | - | | - | approved | |
| 03.20 | 0002 | - | | Ph1 | removing reference to Rec. GSM 03.21 | - | | - | approved | |
| 03.20 | 0001 | - | | Ph1 | Key Kc at Handover | - | | - | approved | |