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lorentz15183233d@j0n4s I think you can use punycode in the rest of the URL regardless of whether the TLD supports punycode domains, right?
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lorentz15183233dMy hunch about punycode is that once we're done exploiting it for phishing attacks, browsers will stop resolving characters that aren't in a well-known non-textlike block like emoji and aren't actively used by the user's current locale.
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lorentz15183233dFor instance, unicode has a stupid amount and variety of non-printable characters none of which should be valid URL elements, not to mention text directionality indicators which might be usable for the most hilarious phishing attack to date.
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j0n4s5310233d@lorentz punycode is only needed for the domain, the rest of the url uses url encoding
https://en.wikipedia.org/wiki/... -
j0n4s5310233d@lorentz something like "google.com/ten.bitcoin" wouldn't be possible as a vast majority of unicode symbols are prohibited in IDN (internal domain names).
See here for allowed/disallowed code points
https://unicode.org/Public/idna/...
And here under chapter 2.6 "Syntax Spoofing" you can see your specific example:
http://unicode.org/reports/tr36/...
Marketing sold a URL with an emoji
rant