| LS | Title | From | To | Approval date |
| SG2-LS120 | LS/r on the new work item ITU-T Q.TSCA “Requirements for issuing End-Entity and Certification Authority public-key certificates for enabling trustable signalling interconnection between network entities in support of existing and emerging networks” (reply to SG11-LS156) | SG2 | SG11; SG17; TSAG; | 2024-06-28 |
| SG11-LS156 | LS/r on the new work item ITU-T Q.TSCA “Requirements for issuing End-Entity and Certification Authority public-key certificates for enabling trustable signaling interconnection between network entities in support of existing and emerging networks” (reply SG2-LS104 and SG17-LS130) | SG11 | SG2; SG17; | 2024-05-10 |
| SG2-LS104 | LS/r on the new work item ITU-T Q.TSCA which defines procedure for issuing digital certificates for signalling security (reply to SG11-LS148) | SG2 | SG11; SG17; | 2024-04-26 |
| SG17-LS130 | LS/r on the new work item ITU-T Q.TSCA (reply to SG11-LS148) | SG17 | SG11; SG2; | 2024-03-01 |
| SG11-LS148 | LS/r on the new work item ITU-T Q.TSCA which defines procedure for issuing digital certificates for signalling security (SG2-LS90) | SG11 | SG2; SG17; | 2024-02-07 |
| SG2-LS90 | LS/r on the new work item ITU-T Q.TSCA which defines procedure for issuing digital certificates for signalling security (reply to SG11-LS62) | SG2 | SG11; | 2023-11-17 |
| SG11-LS62 | LS on the new work item ITU-T Q.TSCA which defines procedure for issuing digital certificates for signalling security [to TSAG and ITU-T SG2] | SG11 | SG2; TSAG; | 2023-05-19 |
