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ICANN Releases Identifier Systems SSR Activities Report

As part of our continuing commitment to transparency and accountability, ICANN's Identifier Systems Security, Stability and Resiliency (IS-SSR) department is pleased to publish its activities report for the second half of calendar 2015 (2H 2015). You can find the 2H 2015 report here [PDF, 429 KB].

This reports describe the activities that are performed to maintain the security, stability, and resiliency of the Internet's global identifier systems. These activities include collaboration with, global security and operations groups and public safety communities where ICANN staff serves in several roles.

Depending on the engagement or request, our staff:

  • offers security or DNS subject matter expertise;
  • facilitates cooperative action among ICANN and other communities to maintain Identifier System Security, Stability, and Resiliency;
  • conducts research;
  • engages with public and private sector actors in capability building related to Identifier Systems SSR;
  • supports the daily efforts of security or operations communities to mitigate the misuse or harmful use of the Identifier Systems (in particular, DNS or domain name registration services).

The 2H 2015 activities reports highlights our collaboration and stakeholder activities from July 1 through December 31, 2015. We summarize activities we perform as part of our identifier system SSR threat awareness and preparedness remit and provide progress reports on analytics or productivity improvement projects as well.

For more information about IS-SSR click https://www.icann.org/resources/pages/is-ssr-2014-11-24-en.

Our 1H 2015 report is available here [PDF, 2.85 MB].

The 2H 2014 report is available here [PDF, 328 KB].

The 1H 2014 report is available here [PDF, 73 KB].

Please contact John Crain or Dave Piscitello with questions, comments or suggestions.


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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""icann.org"" is not an IDN."