Which Character am I Using? Oscar or Null? Lowercase l or One?

E-PasswordCard uses Roboto Mono as character set. There are 2 characters where you could be insecure which one you actually see on the card.

O as Oscar can be held for a Null and an l (laugh) can be mistakenly held for a one. When seeing Oscar, zero, laugh and one near to one another they can be clearly distinguished.