Hanb in domain labels

[Henri Sivonen]

UTS #39 is commonly used as the baseline for detecting IDN spoofs, and UTS
#39 explicitly allows combining Han and Bopomofo. Considering that ㄚ looks
confusable with 丫 and ㄠ looks confusable with 幺, I’m wondering if it’s
appropriate to explicitly allow this combination in the spoof detection
context. Is combining Han and Bopomofo in one domain label something that
occurs commonly enough in domains that aren’t intended to be spoofs for it
being necessary not to treat the script combination as triggering spoof
detection in the domain name context?

-- 
Henri Sivonen
hsivonen at mozilla.com
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