[Last-Call] Re: Opsdir last call review of draft-klensin-idna-rfc5891bis-07

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--On Friday, October 25, 2024 20:10 +0900 "Martin J. Dürst"
<duerst@xxxxxxxxxxxxxxx> wrote:

> Hello John, Linda, others,
> 
> Just a small aside below.
> 
> On 2024-10-25 03:42, John C Klensin wrote:
> 
>> That is usually considered a rather different case from the
>> notorious "paypal" example (cited in the draft) where the
>> Latin-script lower case "a" characters can be maliciously replaced
>> by Cyrillic characters that, with most choices of type styles /
>> fonts, usually look identical.  One can substitute Cyrillic
>> characters that look more or less like "p" and "y" too, and maybe
>> even the "l" (using digit-one if needed), but those substitutions
>> require more assumptions about choices of type styles to avoiding
>> looking alike (or to cause it).  For example, does the
>> Latin-script "p" look like the Cyrillic-script "р" (U+0440)?
>> Maybe.  How about Latin "y" and Cyrillic "ч" (U+0447)?
> 
> No need to use Cyrillic "ч" (U+0447). Cyrillic у (U+0443) does a
> much better job. "раура1" (also with a 'one' at the end) would
> look much more like "paypal" than "рачраӏ".

Indeed.  I was sort of trying to make the "people often see what they
expect to see" point and, for some reason, forgot the more obviously
confusable U+0443 in the process.

thanks,
   john



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