Alice could probably guess shortish numerical passwords like this; I could imagine her doing so to, say, make use of a stolen debit card or something and figure out the PIN. I don’t think she has enough fine detail to determine whether one of the nearly-a-billion possible completed six-character alphanumeric case-sensitive passwords beginning with “A” is the right one, though. She sees in broader swaths than that.
Alice could probably guess shortish numerical passwords like this; I could imagine her doing so to, say, make use of a stolen debit card or something and figure out the PIN. I don’t think she has enough fine detail to determine whether one of the nearly-a-billion possible completed six-character alphanumeric case-sensitive passwords beginning with “A” is the right one, though. She sees in broader swaths than that.