4 ms·

Why ban emoji in username?

• pas 1y ago
  I think for username it's fine, where a bit of restraint makes sense is for billing/shipping/legal-ish data.
• numpad0 1y ago
  Because username and password MUST be in ASCII range?
  • Timwi 1y ago
    No.
    • numpad0 1y ago
      How no? UTF-8 strings has no singular canonical binary representations and typing sequences that correspond to intended texts. Which means it can't be hashed and compared for authentication purposes. No?
• afiori 1y ago
  My reasoning for it would be that they can be very keyboard specific and might require more normalisation than other character classes. If I had to make a specific choice I would probably whitelist the most common emojis for some definition and allow those
• account42 1y ago
  You typically want a bijection from rendered glyphs to binary representation and restricting to ASCII is the most straight forward way to achieve that.