Security and Stability Advisory Committee (SSAC)

The SSAC is a volunteer group of specialists in the technical security field that provides advice and insight to the ICANN community and the Board.

SSAC Publications

The SSAC produces reports, correspondence, and comments on a range of topics. The SSAC undertakes ongoing risk analysis to identify a prioritized list of topics for SSAC work. However, the ICANN Board, Advisory Committees (ACs), Supporting Organizations (SOs) or other bodies within ICANN may request that the SSAC review, comment, or give feedback on a specific topic or issue at any time.

Reports are focused on providing information, recommendations, and advice on technical security, stability, and resiliency (SSR) issues to the ICANN Board, the ICANN community, and the broader internet community. They may investigate emerging or long-term issues or could be published in response to a security event or incident, where timely notification to the community is a priority concern. They may be informational without any findings or recommendations or they could contain specific recommendations for the ICANN Board or community, and if appropriate, organized according to the groups to which they are most applicable.

Correspondence comprises letters, comments, and other documents on administrative, community, and other non-SSR issues and are normally signed by the SSAC Chair. They may take the form of a letter or a response submitted to a public comment forum. They may present recommendations regarding the issue.

Comments are prepared in response to explicit questions posed to or requests made to the SSAC, or as a response to ICANN’s public comment forum. Comments may be brief or long, depending on the issue and the extent to which the SSAC studies it.

A goal of the SSAC is to ensure that its work results in specific actions whenever possible. In order to measure progress towards this goal, the SSAC tracks any effects of each recommendation. For documents that contain recommendations for the ICANN Board, the Board Action Request Register (ARR) captures the information required to understand the status of advice and tracks it from when it is given through implementation.

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SSAC Comments on Proposed Root KSK Algorithm Rollover (pdf, 227.09 KB)SAC133 SAC133 Domain Name System (DNS) SecurityComment
10 Apr 2026
10 Apr 2026
The Domain Name System Runs on Free and Open Source Software (FOSS)
Additional Documents:
Executive Summary(25 Sep 2025)
SAC132 SAC132 Domain Name System (DNS) SecurityReport
25 Sep 2025
25 Sep 2025
SSAC Comments on Functional Model for Root Server System Governance (pdf, 171.49 KB)SAC131 SAC131 Root SystemComment
22 Sep 2025
22 Sep 2025
SSAC Comments on Name Collision Guidelines in the Proposed Language for the Draft Next Round Applicant Guidebook (pdf, 306.54 KB)SAC130 SAC130 Domain Name System (DNS) SecurityComment
22 Jul 2025
22 Jul 2025
SSAC Comments on GNSO Domain Name Registration Data Accuracy Concept Proposal (pdf, 226.92 KB)SAC129 SAC129 Registration ServicesComment
7 Jul 2025
7 Jul 2025
SSAC Comments on Draft Governance Document for the Recognition, Maintenance, and Derecognition of RIRs (pdf, 189.81 KB)SAC128 SAC128 AddressingComment
4 Jun 2025
4 Jun 2025
DNS Blocking Revisited (pdf, 5.25 MB)
Additional Documents:
Executive Summary(16 May 2025)
SAC 127 SAC 127 Domain Name System (DNS) SecurityReport
16 May 2025
16 May 2025
DNSSEC Delegation Signer (DS) Record Automation (pdf, 782.85 KB)
Additional Documents:
Executive Summary(16 Aug 2024)
SAC 126 SAC 126 Domain Name System (DNS) SecurityReport
16 Aug 2024
16 Aug 2024
SSAC Report on Registrar Nameserver Management (pdf, 1.3 MB)SAC 125 SAC 125 Domain Name System (DNS) SecurityReport
9 May 2024
9 May 2024
SSAC Advice on Name Collision Analysis (pdf, 234.04 KB)
Additional Documents:
Executive Summary(1 May 2024)
SAC 124 SAC 124 Domain Name System (DNS) SecurityReport
1 May 2024
1 May 2024
SSAC Report on the Evolution of Internet Name Resolution (pdf, 550.42 KB)
Additional Documents:
Executive Summary(15 Dec 2023)
SAC 123 SAC 123 Domain Name System (DNS) SecurityReport
15 Dec 2023
15 Dec 2023
SSAC Report on Urgent Requests in the gTLD Registration Data Policy (pdf, 166.24 KB)
Additional Documents:
Executive Summary(12 Dec 2023)
SAC 122 SAC 122 Domain Name System (DNS) SecurityReport
12 Dec 2023
12 Dec 2023
SSAC Briefing on Routing Security (pdf, 648.1 KB)SAC 121 SAC 121 Domain Name System (DNS) SecurityReport
9 Jun 2022
9 Jun 2022
SSAC Input to GNSO IDN EPDP on Internationalized Domain Name Variants (pdf, 195.52 KB)SAC 120 SAC 120 Internationalized Domain Name (IDN)Comment
28 Apr 2022
28 Apr 2022
Feedback to the GNSO Transfer Policy Review PDP WG (pdf, 121.14 KB)SAC 119 SAC 119 Registration ServicesComment
5 Aug 2021
5 Aug 2021
SSAC Comments on Initial Report of the Expedited Policy Development Process (EPDP) on the Temporary Specification for gTLD Registration Data Team – PHASE 2A (pdf, 250.07 KB)SAC 118 SAC 118 Registration ServicesComment
15 Jul 2021
15 Jul 2021
Report on Root Service Early Warning Systems (pdf, 205.82 KB)SAC 117 SAC 117 Root SystemReport
13 Jul 2021
13 Jul 2021
SSAC Comments on the Second Security, Stability, and Resiliency (SSR2) Review Team Final Report (pdf, 114.57 KB)SAC 116 SAC 116 Domain Name System (DNS) SecurityComment
22 Mar 2021
22 Mar 2021
SSAC Report on an Interoperable Approach to Addressing Abuse Handling in the DNS (pdf, 731.38 KB)
Additional Documents:
Executive Summary(19 Mar 2021)
SAC 115 SAC 115 Domain Name System (DNS) AbuseReport
19 Mar 2021
19 Mar 2021
SSAC Comments on the GNSO New gTLD Subsequent Procedures Draft Final Report (pdf, 397.67 KB)SAC 114 SAC 114 PlanningComment
11 Feb 2021
11 Feb 2021