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".
Regards, Martin.
More likely to look different with typical choices of fonts, but not necessarily so with all choices. And, to further complicate this, there is a human perception problem: if most readers who are not expecting these issues and not sensitive to them see "рачраӏ", they will perceive "paypal" and move on.
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