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Security, Stability & Resiliency of the DNS Review Team (SSR RT) Final Report

Comment/Reply Periods (*) Important Information Links
Comment Open: 21 June 2012
Comment Close: 30 July 2012
Close Time (UTC): 23:59 UTC Public Comment Announcement
Reply Open: Cancelled – No Comments To Submit Your Comments (Forum Closed)
Reply Close:   View Comments Submitted
Close Time (UTC):   Report of Public Comments
Brief Overview
Originating Organization: Security, Stability & Resiliency of the DNS Review Team (SSR RT)
  • Reviews/Improvements
  • SSR
  • Security/Stability
  • Transparency/Accountability
Purpose (Brief): The Security, Stability & Resiliency of the DNS Review Team (SSR RT) submitted its Final Report and Recommendations [PDF, 1.16 MB] to the ICANN Board, and public comments are requested to inform subsequent Board consideration and action.
Current Status: Final Report for public comment
Next Steps: Under the Affirmation of Commitments, the Board will take action within six months of receipt of the recommendations (Final Report).
Staff Contact: Alice Jansen Email:
Detailed Information
Section I: Description, Explanation, and Purpose
The Security, Stability & Resiliency of the DNS Review Team (SSR RT), constituted under ICANN's Affirmation of Commitments (AoC) agreement with the U.S. Department of Commerce, submitted its Final Report and Recommendations [PDF, 1.16 MB] to the ICANN Board and this document has been posted for public comment. The recommendations were finalized in light of the feedback received on the Review Team's draft report [PDF, 1.13 MB] via the online public comment process.
Section II: Background
Over the past 19 months, the Security, Stability & Resiliency of the DNS Review Team engaged in extensive outreach to communities within and outside of ICANN. The Final Report draws from fact-finding efforts, analysis of key documents, as well as from interviews conducted with experts. The input received from Supporting Organizations, Advisory Committees and constituencies via public comment periods, public forums and individual meetings also was factored into the Review's Team work.
Section III: Document and Resource Links

The Security, Stability & Resiliency of the DNS Review Team Final Report is available at: [PDF, 1.16 MB]

Section IV: Additional Information

The Community is invited to provide input on the final report by 30 July 2012. Please submit your comments to:

Since this document was received by the Board four days before the opening of the ICANN Prague meeting, the comment period has been extended to accommodate community consideration and input after the meeting.

(*) Comments submitted after the posted Close Date/Time are not guaranteed to be considered in any final summary, analysis, reporting, or decision-making that takes place once this period lapses.

Domain Name System
Internationalized Domain Name ,IDN,"IDNs are domain names that include characters used in the local representation of languages that are not written with the twenty-six letters of the basic Latin alphabet ""a-z"". An IDN can contain Latin letters with diacritical marks, as required by many European languages, or may consist of characters from non-Latin scripts such as Arabic or Chinese. Many languages also use other types of digits than the European ""0-9"". The basic Latin alphabet together with the European-Arabic digits are, for the purpose of domain names, termed ""ASCII characters"" (ASCII = American Standard Code for Information Interchange). These are also included in the broader range of ""Unicode characters"" that provides the basis for IDNs. The ""hostname rule"" requires that all domain names of the type under consideration here are stored in the DNS using only the ASCII characters listed above, with the one further addition of the hyphen ""-"". The Unicode form of an IDN therefore requires special encoding before it is entered into the DNS. The following terminology is used when distinguishing between these forms: A domain name consists of a series of ""labels"" (separated by ""dots""). The ASCII form of an IDN label is termed an ""A-label"". All operations defined in the DNS protocol use A-labels exclusively. The Unicode form, which a user expects to be displayed, is termed a ""U-label"". The difference may be illustrated with the Hindi word for ""test"" — परीका — appearing here as a U-label would (in the Devanagari script). A special form of ""ASCII compatible encoding"" (abbreviated ACE) is applied to this to produce the corresponding A-label: xn--11b5bs1di. A domain name that only includes ASCII letters, digits, and hyphens is termed an ""LDH label"". Although the definitions of A-labels and LDH-labels overlap, a name consisting exclusively of LDH labels, such as"""" is not an IDN."