Not all websites offer them. Hell, no bank I use (several large and several regional) support generic totp. Some have sms, one has Symantec VIP, proprietary an

Not all websites offer them. Hell, no bank I use (several large and several regional) support generic totp. Some have sms, one has Symantec VIP, proprietary and not redundant. Edit: since I'm posting too fast according to HN, even though I haven't posted in an hour, I'll say it here. Symantec is totp but You cannot back up your secrets and you cannot have backup codes.