What are the odds that two randomly selected people share the same bank PIN?
October 27, 2012 1:17 PM Subscribe
Statisticsfilter: Given available information about the distribution of self-selected 4-digit passwords (specifically banking PINs), is it possible to calculate the probability of two randomly selected individuals having the same PIN? If so, what're the odds?
posted by myrrh to computers & internet (15 answers total) 2 users marked this as a favorite
What I'd like to know is, if you had the sample set used here
(a compelling analysis of leaked 4-digit passwords), could you calculate the probability of two random users in that dataset sharing a PIN? Given the information visualized there, could you? (Turn the infographic back into numbers, do some math magic?)
If not, what data would
you need in order to approximate a probability? Or if so, what are the odds?
Other perhaps-relevant thing I found while googling around: Probability of the same PIN digits, author assumes uniform distribution (I know that's an actual probability/statistics term, but that's all I know).