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Securely Managing Your Domain Name

This web page aggregates existing content across the icann.org website on the topic of securely managing a domain name. If you have suggestions or would like to submit an inquiry, please contact ICANN organization's Global Support Center'sGlobal Support Center.

Contractual compliance complaints can be submittedhere.

For more information:

Do you have a domain name? Here's what you need to know (part 6)

Do you have a domain name? Here's what you need to know (part 4)

Information about phishing

Be careful what you click: Alert of new fraudulent domain renewal emails

SAC 040 - Measures to Protect Domain Registration Services Against Exploitation or Misuse

SAC044 - A Registrant's Guide to Protecting Domain Name Registration Accounts

SAC0011 - Problems caused by the non-renewal of a domain name associated with a DNS NameServer

SAC0010 - Renewal Considerations for Domain Name Registrants

SSAC's DOMAIN NAME HIJACKING: INCIDENTS, THREATS, RISKS, AND REMEDIAL ACTIONS

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."
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