(Original post by Mad Vlad)
Selecting a memorable random 4 letter word that isn't anything personal to you, as muffingg suggested, is just as good as getting a pseudo-random number generator to do it. Remember, this PIN does not have to stand up to days of brute force against a billion Dollar supercomputer - it has to withstand 3 attempts.
If you have a handheld card reader from for example Barclays, Nationwide, Natwest or RBS, it will tell you if the PIN you enter is correct, so it is possible to pre-check the PIN before you go out.
(Original post by marcusfox)
Like others have said, it just needs to be unguessable in 3 attempts. And you carry it with you so you won't forget.
An interesting study on card readers by Cambridge: http://www.cl.cam.ac.uk/~sjm217/pape...9optimised.pdf
Last edited by S23a; 14-05-2012 at 09:55.