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ICANN 是一家非营利公益型企业,其社群成员遍布全球各地,致力于确保互联网的安全性、稳定性和互用性。



数据保护与隐私更新 - 新年计划

根区 KSK 轮转项目最新动态



ICANN 会议战略的拟定渐进调整



准备好了迎接根区 KSK 轮转?

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ICANN 正计划变更或轮转用于保护域名系统的顶级加密密钥对。这是根区密钥签名密钥 (KSK) 自 2010 年最初生成以来的首次更换。点击以上链接即可详细了解即将实施的根区 KSK 轮转。


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有意了解 ICANN 的工作以及参与 ICANN 活动的重要性?点击以上链接即可使用您的语言访问我们的信息图表,了解有关如何参与活动并获取最新进展的信息。

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."