IDNs do not affect DNS security and stability because the DNS only cares about the Punycode version of the domain. IDNs have existed on some extensions since 2002.

Web browser developers have responded to this threat by displaying the Punycode version if there is the possibility of the homograph attack,or only displaying domains if they are in one character set. This kind of issue is at the application level, and can be dealt with at that level rather than making changes to the DNS to accommodate for these type of attacks.

Internationalized Domain Names will increase Internet accessibility worldwide, particularly for people using non-Latin alphabets such as Arabic, Chinese, Cyrillic, Greek, Hebrew, Japanese, and Korean. Many countries have started registrations for IDN.IDN domains. Until these extensions are approved by ICANN and added to the root routers, they cannot be used globally. Demand is greatest for Arabic, Chinese, Cyrillic, India, and Latin language domains, with more than half of internet users now using non-Latin scripts. Currently Chinese is the second most common IDN domain with over 12 million registrations, only after .com.