Punycode is defined in RFC 3492 as a way to represent Unicode within the limited character subset of ASCII used for Internet hostnames.

For example, "M√ľnchen" (German name for the city of Munich) would be encoded as "Mnchen-3ya".

Using Punycode, host names containing Unicode characters are transcoded to a subset of ASCII consisting of letters, digits, and hyphen (the Letter-Digit-Hyphen (LDH) subset, as it is called).

Punycode has been used in Phishing Attacks to miss-represent hostnames[2] [3]

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« This page (revision-4) was last changed on 12-Jul-2017 10:51 by jim