On 11/1/25 1:18 PM, John C Klensin wrote:

[snip]


The Cyrillic paypal example was chosen, not because it was a
realistic name but because it is extremely familiar to many of those
who might be reading this discussion and/or the final document.
However, and probably sadly, you have just made my point (or three of
them):

Hi,

That's a real thing. I think the general term is "homograph attack".

But it is a known and old problem:

https://www.mozilla.org/en-US/security/advisories/mfsa2013-61/

(2013).

The general recipe is usually not to allow mixed character ranges. So, is there something useful we can say here?

thanks,
Rob

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