"If Unicode characters are accepted in memorized secrets, the verifier SHOULD apply the Normalization Process for Stabilized Strings defined in Section 12.1 of

"If Unicode characters are accepted in memorized secrets, the verifier SHOULD apply the Normalization Process for Stabilized Strings defined in Section 12.1 of Unicode Standard Annex 15 [UAX 15] using either the NFKC or NFKD normalization." I had not even thought about normalization before in this context, but I could see it being an issue if a user moves to a new device. But what if new composed characters are added to Unicode, does that mean the user can no longer log in with NFC passwords? I guess that K in NFKC is important.